Hello!
It is a while since I have encountered this problem. The first time I noticed it was after a system upgrade of Manjaro. Basically, de cursor is becoming invisible (but still working) at random while working, I am not able to find any pattern that could be due to it. After a while, since I was thinking I could have done something wrong, I formatted everything and reinstalled Manjaro and Windows in dual-boot. In the beginning, this problem was not present but now it reappeared and I don’t know why.
The only thing that I have noticed, is that when it becomes invisible if I change the mouse input it becomes visible again, for instance, if I am working with the mouse and the problem shows I can move the cursor with the touchpad and the cursor becomes visible again (it is also the other way around).
This post “Mouse Cursor Disappearing” seems to be related, but I was not able to solve my problem.
Here are some details of my system:
Linux manjaro 5.9.16-1-MANJARO
x86_64 GNU/Linux
Processor: Intel® Core™ i5-6200U CPU @ 2.30GHz × 4
Graphics: Mesa Intel® HD Graphics 520 (SKL GT2)
Gnome Version: 3.38.4
Windowing System: Wayland
Thank you very much for your help!