After the 1.19.40, I've seen alot of frame drops while on my inventory or playing, I'm not on any real or server, Im on my solo survival, also I don't have multiplayer enable. Im playing with mouse and keyboard on my Xbox
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We're tracking this issue in MCPE-162277, so this ticket is being resolved and linked as a duplicate.
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This possibly affects the Nintendo Switch as well.
I'm not sure if it's a bug different to this one, or just because of the lowered frame rate of the inventory screen, but when using the inventory grid or a crafting table, there's a small delay between crafts whereas in 1.19.30 you could craft in quick succession.