After 1.16.210 I’ve noticed that my Efficiency V pickaxe became much slower!!
I mean it still break blocks such as netherrack instantly, BUT the time of switching from one block to another seems to become at least 2 times longer. Before I could sprint and mine in the nether without hitting blocks but now I can’t even walk and mine at the time. Sometimes you kinda miss the block and don’t mine it, this never happened before

Also it’s definitely not my phone performance issue, I run on 11 pro max. I even tried to lower render distance to 8 chunks along with minimal video settings but literally nothing changed

Edit: I added 2 videos of old efficiency perfomance and what it is now