Sorry for a delay, quite a lot of other work over week.
So back to the problem with themes. I do not have the best solution. Rewriting the whole system and do it "theme-centric" (renderer selected based on the version of the theme) instead of "map-centric" (renderer selected based on the version of the map) is quite a big change. And because everything slowly moves to use new engine & new themes, it looks to me like a waste of time.
SO new setup of system:
V3 maps: offer V3 (basic + locus-extended) themes
V4+ maps: offer V4+ themes
I belive this won't be a big problem. Users that use LoMaps, usually use internal themes or themes with "locus-extended" system. Users who wants to use OpenAndroMaps, usually use themes for these maps.
@zossebart
hmm two same theme selectors in one view do not make too sense, agree. The crash is weird anyway in the next version will be only one button to select the theme, so hopefully, it will help.
WMS maps: any map for test?
EDIT: wms sample not needed, I see one big problem, thanks!
@flyingman_ch
only a side effect of horizontal GPS filter you have enabled in settings > GPS. This thin line only displays real GPS coordinates received by Locus Map and may be used for comparing with tracks recorded with Track recording. I'll leave it there for a while for testing and remove it later. But do not worry about it, it has no effect on anything.