Moving over the screen the cursor sometimes changes from theme

Every desktop has its own way to select the cursor theme

Because we want to have a consistent cursor theme we have defined on all our desktops that we use breeze snow.

Navigate to this folder /usr/share/icons/default 

You will find the file index.theme with this content (fix for mouse in plasma changing all the time).

 Change here also to the correct cursor theme 

[Icon Theme]
Inherits=Breeze_Snow

If you want an other cursor EVERYWHERE, you need to change this one too.

THE CURSOR theme IS NOT APPLIED?

DID YOU TRY
TURNING IT OFF
AND ON AGAIN