Glance launcher icon not shown on Edge x40 devices

I have received a user report that on an Edge 540 my glance does not display an icon.

After raising this in the forum, it appears that other apps are affected as well. The issue seems to have been introduced with one of the recent firmware updates.

It appears to affect only x40 devices. On x50 devices the icons are displayed, apart from some unrelated rendering issues.

Here the forum thread with some photos of real devices showing the issue:

 Glance launcher icon not showing on Edge devices