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-rw-r--r--dex/cache.go2
1 files changed, 2 insertions, 0 deletions
diff --git a/dex/cache.go b/dex/cache.go
index e56e706f9..96ba2d765 100644
--- a/dex/cache.go
+++ b/dex/cache.go
@@ -92,6 +92,8 @@ func (c *cache) votes(pos coreTypes.Position) []*coreTypes.Vote {
func (c *cache) addBlock(block *coreTypes.Block) {
c.lock.Lock()
defer c.lock.Unlock()
+ block = block.Clone()
+ block.Finalization.Height = 0
if len(c.blockCache) >= c.size {
// Randomly delete one entry.
for k := range c.blockCache {