Unity UI iOS memory keep increasing infinitely when have animated UI element

Recently I've faced an extraordinary memory leak in the UI system. Game memory consumption keeps increasing when there is an animated UI item (an Image, for instance). I leave the game idly run without any interaction and see in XCode, memory increases about 1MB every 5 seconds and doesn't stop until the OS runs out of memory and terminate the game. If I disable the canvas that contains that Image, memory stops increasing immediately. I've checked Profiler and noticed that in Memory section, Used Total and Reserved Total doesn't increase at all. But in CPU Usage section, there is a 2KB GC Alloc every frame caused by Canvas.SendWillRenderCanvases(). I think this is the cause of the leak, but I can't find a way to eliminate it. I've also tried setting up a similar environment on an empty project but haven't faced the leak. Did we do something wrong?

 

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