Have been having this issue - also sporadic issues with feature layers not showing up in new Map Viewer.
In trying to troubleshoot, I have tried various combinations - browsers - to see if there are differences.
I have disabled browser extensions i.e., security - different ones, to test if this has an effect.
I reset browser settings (Edge) to default settings.
Firefox seems to work better than Edge - have not yet tested Chrome or Safari, as those are not used as much by our customers.
Question: Was AGOL tested and certified in every browser flavor before these latest changes/releases? Can't find any of that on the Esri Site (testing certifications) for AGOL - if these exist, please send a link.
This is pretty serious, as we cannot produce anything for customers while we are having these issues until we know more.
I'd be happy to sit online and show what I've found. Screen shots will not show anything as you kind of have to be looking at it when it's happening (or not happening).
Also, since having these issues, some of my hosted content gives some error messages - permissions - like I don't have access when I'm the owner of the content (?) - anyone else experiencing this?
This is content that I published under the user_id that is the administrator of the overall site and has the max permissions.
These worked awhile back - any way to get our AGOL audited for corruption issues or is that something we have to take up with support? Would be great to be notified if there are errors in our AGOL instance so that we can troubleshoot.
Just noticed these issues beginning last Thursday/Friday time frame, but can't say they didn't start earlier, as we normally check our gallery about once a month for issues. Some of the content is older and might require updating - since we see some of the old base-maps are now deprecated, stuff like that.
Any help on this will be appreciated. In the meantime, we will not use Edge, since there appears to be something going on in that browser that isn't in Mozilla Firefox.