I can't hit mobs or mine while moving or jumping. I changed my mouse settings as mentioned in previous search but it didnt work. It has just recently happened, before this I have been playing minecraft for 2 years and it never happened. I have even tried reinstalling minecraft.
Environment
HP Laptop, Windows 10 OS, Minecraft Java: 1.16.5
Comments 3
I second Oakstar's thoughts, I used to experience this issue on an old laptop I had. It is most likely your system disables your touchpad/mouse momentarily whilst typing (perhaps your device isn't intended for gaming?)
Search phrases like "mouse won't move while pressing keys" may find an appropriate solution for you as I can't link third party sites.
If this doesn't help do reply notifying!
This is most likely caused by some kind of software that blocks trackpad use when typing. If you've installed anything like this, disable it; if not, it might be in the computer's settings. (Even if you aren't using a trackpad, this kind of software also blocks mouse clicks.)