Massive Frame Drop for Some HEVC Playbacks on Jellyfin Chrome

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I noticed that some (not all) of the HEVC playbacks on Jellyfin Chrome experienced massive frame drop, but those problematic HEVC videos can be played normally on Jelly Desktop (Windows). I was wondering the reasons behind this. Both versions of Jellyfin are tested on the same machine which supports HEVC codec and transcode is disabled.

The attached image is a table showing the media info of some problematic (marked in red cross) and normal (marked in green tick) HEVC playbacks.    

Please let me know if any other information is needed. Thank you!