@petra-pik I'm using the desktop website. When I choose isolines (see screenshot), it'll display properly UNTIL I change anything about the current page (i.e. refresh the page, change to a different layer, etc.). "i:temp" is appended to the end of the URL after choosing the isoline setting that I want, but once I make any changes, that is removed.

I have the exact same problem on my desktop (Windows 10, Chrome) - they show up briefly then disappear when the page finishes loading.

I'd love to be able to keep them.