POI Icons on map are not shown (403 error from DigitalOceanSpaces)

Hi, it seems there is some kind of authorization error for loading the POI icons on the map - in dev mode in the browser, I see a 403 (Forbidden) error for those, like:

For Paris as an example - it looks like this on the map:

Interestingly, the "city icon" in the middle is properly shown.

I have tested both on MS Edge (where my uMatrix addin sometimes gives me a hard time), but also with Chrome, where no addins are in place, and the effect is the same.

Best regards
Sascha