You might try a PM to Nico if you are able to, or a wall post, he is more likely to respond to those. Or if you have Discord you could ask on the WGT Discord channel where you can find Nico and Champion (I've been told, I don't use it myself).
EDIT: Just a thought, is it a setting in your browser? On some websites (e.g. when viewing videos) the cursor will disappear after a few seconds of mouse inactivity.
Maybe ScottHope might have some workaround if it's a WGT problem.