Brush stroke and brush movement don't coincide

Hi, when I'm moving my brush in PS the brush stroke does not cover the same distance as the actual movement. This only happens when I move my hand quickly.  The brush stroke is not slow or lagging, it just doesn't cover the same distance as the stroke I made with my hand and kinda stops half way.

I'm working with the latest PS version on a new Mac Mini. And I'm not using a different brush setting or a brush I've not used before.

I'm - of course - on the clock with a deadline looming. I can't work like this, unless I decide to move my hand very slowly, which really isn't an option. So, if anyone has an any idea how I can fix this, it would be much appreciated!! 🙂

Thanks!
JP