Battery Drain/Constant Wakelock
Let me get this out of the way first: This is about using an unofficial LineageOS build. I just thought you might give me some pointer where to try out different settings.
I just installed LineageOS 15.1 (as mentiones, unofficial) on my old Galaxy Note 4. All works fine, GPS accuracy just like before - but it's eating away the battery like crazy when recording a track. Turning on Flight Mode, changing the GPS method in Locus, doesn't change anything. I switched off background scanning in Location settings, too.
Now I have two other phones with LineageOS 15.1 (official), where Locus battery consumption is minimal, especially in Flight Mode. Also, when I still had CM12.1 on the Note4, it was minimal.
An analyzer app tells me, that Locus keeps constante Wakelock while recording. Doesn't do that on other phones.
As I said, I'm aware that this might be entirely the ROM's fault - but perhaps you know some stuff I could check/try out. After all, you probably spend quite some time on battery related issues before... Thx!