lib/bunny/channel.rb in bunny-2.18.0 vs lib/bunny/channel.rb in bunny-2.19.0

@@ -1787,10 +1787,10 @@
     end
 
     # @private
     def handle_ack_or_nack(delivery_tag_before_offset, multiple, nack)
       delivery_tag          = delivery_tag_before_offset + @delivery_tag_offset
-      confirmed_range_start = multiple ? @delivery_tag_offset + 1 : delivery_tag
+      confirmed_range_start = multiple ? @delivery_tag_offset + @unconfirmed_set.min : delivery_tag
       confirmed_range_end   = delivery_tag
       confirmed_range       = (confirmed_range_start..confirmed_range_end)
 
       @unconfirmed_set_mutex.synchronize do
         if nack