My name is Lera, I've been playing Minecraft bedrock since version 0.14.3

Hello, I had a problem on ios gadgets in minecraft after updating it, I log into the game everything is fine, I play for +-10 minutes everything is as smooth as before, then abruptly 0 fps and lags, then again for a period of time everything is fine and then again the same unpleasant situation with lags, with versions before 1.21.70 were fine, even with add-ons, I reinstalled, deleted all unnecessary add-ons, worlds, cleared the cache, etc., but this did not change the situation, I play on iPhone 15 and iPad 7 generation