Video should be able to be minimized to an arbitrary slot element Doesn't work on real Mobile device

Hello,
Minimizing to an arbitrary slot doesn't work on real mobile devices.

I prepared a test page using the code on AMP advanced docking demo by removing the css part which hide the dock slot on smaller devices to fallback to standard docking and it doesn't consistently dock/undock on any real mobile devices.

Link of the AMP demo:
https://playground.amp.dev/?url=https://preview.amp.dev/documentation/examples/multimedia-animations/advanced_video_docking

Link of my test page :
https://i.plug.it/st/iplug/js/lib/iol/video/test/amp.dock.sample.html

I tested this on Chrome simulating and it works as expected but doesn't work correctly on mobile device.

Please let me know your findings.

Thank you!