After the 1.19 update, a friend and I (the friend also plays on an iPad, iOS 15, similar in-game settings), noticed that the directional pad often stopped responding properly. 

The sensitivity settings are unchanged, but even setting them high doesn't help. Even if you increase the size of the directional pad, the problem remains. 

When you press the "to the side" button (as seen in the video), the button either doesn't react at all and you punch somewhere in the air, or it is pressed but the movement is not executed.

Sometimes running to the side works, but that's more a matter of luck.

The whole thing sounds like a minor problem, but it's not. We, (that is, people with the control pad for iPad, iPhone or Android devices) can no longer properly fight, dodge or overall play with the same game quality as before the update. Since a friend has the same problem, it is safe to assume that the bug is not specific to my device, but more general.

I hope the bug can be solved. If there are still questions, I'm happy to help out.

Thanks in advance for the help.