diff --git a/core/src/main/java/haveno/core/offer/OfferBookService.java b/core/src/main/java/haveno/core/offer/OfferBookService.java
index 16faa81e57..50981a8fa6 100644
--- a/core/src/main/java/haveno/core/offer/OfferBookService.java
+++ b/core/src/main/java/haveno/core/offer/OfferBookService.java
@@ -149,6 +149,20 @@ public class OfferBookService {
                             Offer offer = new Offer(offerPayload);
                             offer.setPriceFeedService(priceFeedService);
                             announceOfferRemoved(offer);
+
+                            // check if invalid offers are now valid
+                            synchronized (invalidOffers) {
+                                for (Offer invalidOffer : new ArrayList<Offer>(invalidOffers)) {
+                                    try {
+                                        validateOfferPayload(invalidOffer.getOfferPayload());
+                                        removeInvalidOffer(invalidOffer.getId());
+                                        replaceValidOffer(invalidOffer);
+                                        announceOfferAdded(invalidOffer);
+                                    } catch (Exception e) {
+                                        // ignore
+                                    }
+                                }
+                            }
                         }
                     });
                 }, OfferBookService.class.getSimpleName());
@@ -298,20 +312,6 @@ public class OfferBookService {
         synchronized (offerBookChangedListeners) {
             offerBookChangedListeners.forEach(listener -> listener.onRemoved(offer));
         }
-
-        // check if invalid offers are now valid
-        synchronized (invalidOffers) {
-            for (Offer invalidOffer : new ArrayList<Offer>(invalidOffers)) {
-                try {
-                    validateOfferPayload(invalidOffer.getOfferPayload());
-                    removeInvalidOffer(invalidOffer.getId());
-                    replaceValidOffer(invalidOffer);
-                    announceOfferAdded(invalidOffer);
-                } catch (Exception e) {
-                    // ignore
-                }
-            }
-        }
     }
 
     private boolean hasValidOffer(String offerId) {
diff --git a/core/src/main/java/haveno/core/offer/OpenOfferManager.java b/core/src/main/java/haveno/core/offer/OpenOfferManager.java
index 1dec0aff56..c857ce533e 100644
--- a/core/src/main/java/haveno/core/offer/OpenOfferManager.java
+++ b/core/src/main/java/haveno/core/offer/OpenOfferManager.java
@@ -1574,14 +1574,6 @@ public class OpenOfferManager implements PeerManager.Listener, DecryptedDirectMe
                 }
             }
 
-            // verify the max version number
-            if (Version.compare(request.getOfferPayload().getVersionNr(), Version.VERSION) > 0) {
-                errorMessage = "Offer version number is too high: " + request.getOfferPayload().getVersionNr() + " > " + Version.VERSION;
-                log.warn(errorMessage);
-                sendAckMessage(request.getClass(), peer, request.getPubKeyRing(), request.getOfferId(), request.getUid(), false, errorMessage);
-                return;
-            }
-
             // verify maker and taker fees
             boolean hasBuyerAsTakerWithoutDeposit = offer.getDirection() == OfferDirection.SELL && offer.isPrivateOffer() && offer.getChallengeHash() != null && offer.getChallengeHash().length() > 0 && offer.getTakerFeePct() == 0;
             if (hasBuyerAsTakerWithoutDeposit) {
diff --git a/core/src/main/java/haveno/core/xmr/wallet/XmrKeyImagePoller.java b/core/src/main/java/haveno/core/xmr/wallet/XmrKeyImagePoller.java
index 1cde84152c..3bebb71b7f 100644
--- a/core/src/main/java/haveno/core/xmr/wallet/XmrKeyImagePoller.java
+++ b/core/src/main/java/haveno/core/xmr/wallet/XmrKeyImagePoller.java
@@ -144,7 +144,6 @@ public class XmrKeyImagePoller {
             if (!keyImageGroups.containsKey(groupId)) keyImageGroups.put(groupId, new HashSet<String>());
             Set<String> keyImagesGroup = keyImageGroups.get(groupId);
             keyImagesGroup.addAll(keyImages);
-            refreshPolling();
         }
     }
 
@@ -159,8 +158,13 @@ public class XmrKeyImagePoller {
             if (keyImagesGroup == null) return;
             keyImagesGroup.removeAll(keyImages);
             if (keyImagesGroup.isEmpty()) keyImageGroups.remove(groupId);
+            Set<String> allKeyImages = getKeyImages();
             synchronized (lastStatuses) {
-                for (String lastKeyImage : new HashSet<>(lastStatuses.keySet())) lastStatuses.remove(lastKeyImage);
+                for (String keyImage : keyImages) {
+                    if (lastStatuses.containsKey(keyImage) && !allKeyImages.contains(keyImage)) {
+                        lastStatuses.remove(keyImage);
+                    }
+                }
             }
             refreshPolling();
         }
@@ -171,10 +175,10 @@ public class XmrKeyImagePoller {
             Set<String> keyImagesGroup = keyImageGroups.get(groupId);
             if (keyImagesGroup == null) return;
             keyImageGroups.remove(groupId);
-            Set<String> keyImages = getKeyImages();
+            Set<String> allKeyImages = getKeyImages();
             synchronized (lastStatuses) {
                 for (String keyImage : keyImagesGroup) {
-                    if (lastStatuses.containsKey(keyImage) && !keyImages.contains(keyImage)) {
+                    if (lastStatuses.containsKey(keyImage) && !allKeyImages.contains(keyImage)) {
                         lastStatuses.remove(keyImage);
                     }
                 }
@@ -265,6 +269,7 @@ public class XmrKeyImagePoller {
 
         // announce changes
         if (!changedStatuses.isEmpty()) {
+            log.info("Announcing " + changedStatuses.size() + " key image spent status changes");
             for (XmrKeyImageListener listener : new ArrayList<XmrKeyImageListener>(listeners)) {
                 listener.onSpentStatusChanged(changedStatuses);
             }
diff --git a/desktop/src/main/java/haveno/desktop/main/offer/offerbook/OfferBookViewModel.java b/desktop/src/main/java/haveno/desktop/main/offer/offerbook/OfferBookViewModel.java
index 821b081454..9a52902f3e 100644
--- a/desktop/src/main/java/haveno/desktop/main/offer/offerbook/OfferBookViewModel.java
+++ b/desktop/src/main/java/haveno/desktop/main/offer/offerbook/OfferBookViewModel.java
@@ -174,9 +174,11 @@ abstract class OfferBookViewModel extends ActivatableViewModel {
         tradeCurrencyListChangeListener = c -> fillCurrencies();
 
         // refresh filter on changes
-        offerBook.getOfferBookListItems().addListener((ListChangeListener<OfferBookListItem>) c -> {
-            filterOffers();
-        });
+        // TODO: This is removed because it's expensive to re-filter offers for every change (high cpu for many offers).
+        // This was used to ensure offer list is fully refreshed, but is unnecessary after refactoring OfferBookService to clone offers?
+        // offerBook.getOfferBookListItems().addListener((ListChangeListener<OfferBookListItem>) c -> {
+        //     filterOffers();
+        // });
 
         filterItemsListener = c -> {
             final Optional<OfferBookListItem> highestAmountOffer = filteredItems.stream()