On Android the game now has a very bad performance since the 1.18.30 update, constant lag and freezes that werent there before the update. Especially when flying around in a normal world the game regularly freezes and the chunk loading is extremely slow. Also there is a notable input lag when using touch controls. The game used to run fine in previous versions.
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We're tracking this issue in MCPE-142934, so this ticket is being resolved and linked as a duplicate.
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