So, I play on both Android and Windows 10 now, however, I've discovered a scary similarity
Both versions of the game suffer performance drops whilst loading chunks, opening inventories, and while generally playing.

When I first installed Bedrock on PC, it ran almost perfectly. A couple small frame drops here and there, however, after a few days, the performance suddenly got really bad.

I can confirm it is not any programs I have running as before I had only Discord running, and that is still true. The only thing that has been added since is AVG, and that was added after the performance issues popped up.

This is pretty serious if it's cross platform as well. It should be noted that servers lag as well, so it's not isolated to singleplayer or realms. It has to do with some issue in the client.