Maybe you can help me with this. I was out and about in the sierras decided to take the trail up to central camp above bass lake. Ontne way up part of my screen went blurry the other part not. Not so blurry you couldn’t make out any thing but enough that you could recognize trails topo lines etc but couldn’t distinguish anything I was just running it on my iPhone 11 and the transfer to the jeeps main screen I was pretty sure I had downloaded the whole area awhile back I think I had the usgstopomap running as a base and not the Gaia base . I dint think much about it then but could that have been the problem?
Change the layers to see which one was not downloaded fully. That’s the easiest way to correct things. I recommend downloading an entire State with the Gaia Topo layer. The file size is reasonable. Then you know you have at least one map layer with coverage.
If you saved a set of layers you can always see that under the Saved tab. Find what you saved, say Blah Lake, for example and the click the show on main map button. That should force everything you downloaded to display.
It sounds like you had a layer either not downloaded at all or not completely downloaded. What you were seeing was the cached data in Gaia. It got blurry when you ran out of cached data. You can always clear your cache, set your phone I. Airplane mode with WiFi off and then check your maps again.