I'm Miles, also see: http://milesalan.com
My nick is mla on IRC.
Unable to replicate.
I wonder if this is a permission error related to how Flatpak is setup globally on Mobian (e.g. do other Flatpak's have internet access?). I haven't had time to test (besides testing Flatpak locally / e.g. not directly on Mobian) but what your describing with showing 'queueing' and alternating is essentially how mepo acts when the application doesn't have internet connection or very slow connection (e.g. hitting timeout limit for tile downloads, failing and restarting).
Also - I don't think this would necessarily change things but I did publish a new Flatpak for the 1.2.0 release a few days ago so you may want to give that a shot as well.
Regarding offline usage - you can download tiles via mepo itself (caveat: #62) and don't necessarily need a tileserver (although local tileserver will work too if you want to go that route); see userguide for downloading tiles for later offline usage via mepo: http://mepo.milesalan.com/userguide.html#offline-usage
So as mentioned in #73 you should just use geoclue; if gpsd is properly configured, geoclue will use gpsd implicitly (and I want to remove gpsd altogether from mepo's codebase).
As far as configuring GPS / gpsd, that's a per-device concern and out-of-scope for mepo itself; but I do agree mepo's documentation could use some work and be more helpful in pointing users to guide(s) on how to properly configure gpsd for their device on the postmarketOS wiki etc.
Raised in #72 in reality we should just deprecate / remove all coordsviagpsd functionality as geoclue will use gpsd in anycase. The gpsd CLI logic (and extra adhoc configuration) just adds extra complexity and confusion for end-users.
If GPSD is properly configured, geoclue will use it properly either way and pass this through for mepo.
Let's pickup discussion on GPS on https://todo.sr.ht/~mil/mepo-tickets/72 as this ticket was more about setting ENV vars.
I think pointing to the postmarketOS wiki or a similar guide on how to configure GPS would be the best course of action here.
Currently the main documentation on mepo userguide is: http://mepo.milesalan.com/userguide.html#repositioning-the-map