[LG V20 ROMs, Kernels, Recoveries, & Other Developm] CM-Tester:
[MENTION=2881807]x86cpu[/MENTION] Soooooo... after a week of flashing (about 20 times lineage with many different settings with and without gapps and alpha-rom with a good gps-lock and again back to lineage) and a test-marathon, i can say the following about the gps-issue:

General things, i ever do in EVERY rom:

- ROOT (with supersu) !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

- Use a firewall and only let apps through, i really need internet for

- Set all privacy settings (that i not need, like magic earth want to know my contacts, or firefox want to know my location....) of apps, that are white-

listet in my firewall, to not "not allowed" (except rights, an app really need... like magic earth and the location right for example)

- Killed auto-boot of all unimportant apps

As i said, i did not used/flashed gapps for a long time, but magic earth always said, it needs the play services to run, which is probably a big lie, i am sure (why, you can read below), but to eliminate the possible issue, i tested the whole stuff WITH installed gapps.

First thing i did... Flashed newest open gapps to my current/installed lineageos...

Every part of gapps include play services blacklisted in my firewall and killed auto-boot of some gapps-parts (except play store and play-services).

No change... Magic Earth and GPS Status (https://play.google.com/store/apps/details?id=com.eclipsim.gpsstatus2) often had lost the gps-signal (about every 3-5 minutes, like before without flashed gapps).

After a week of testing/flashing...

Last step i did... Flashed newest Alpha-ROM vor my us996, reboot and some settings...

Then only 3 or 4 apps (file explorer, lg calendar...) of the WETA-Bloat-Apps-zip (because Alpha-Bloat-Apps-zip won´t work for me / the phone crashed every time after flashing them), then reboot and then i did my complete seettings (installed titanium backup and DELETED EVERY PART OF THE GAPPS (inclusive hello-google and all that google stuff), firewall, privacy settings, installed all of my apps, general settings and all that stuff.

Lastly i started Magic Earth, adjusted all my settings in it, did load all offline maps i wanted and then yesterday and today big test, by driving 2 times about 90 minutes by car....

...

...

AND NOW... WITHOUT GAPPS INSTALLED, ON ALPHA ROM, Magic Earth told me like every time, it needs the play services to run, BUT IT RUNS WITHOUT ANY ISSUE... The whole time i can see the icon of GPS-Status in the top left and everything worked fine..

So the fact is:

It is not a hardware-issue.

It is not an issue, because the gapps are not installed

It is not an issue, because of some privacy-settings (because i use the same settings every time on every rom)

It is not an issue, because some apps are blacklisted in the firewall (because i use the same settings every time on every rom)

It is not an issue, because i switched off some auto-boot of some apps (because i use the same settings every time on every rom)

It must be an issue with lineage (by the way, i tested it with 4 different weekly´s inclusive the newest one),

but i have no idea what exactly is the problem...

So now i am ready with the report and now i am in holiday for 2 days and after that i would like to come back to flash lineage, because lineage is the first choice for me, but if the issue persist, i need to stay on alpha :(

Maybe you ore someone else would test the navigation-app magic earth with installed offline maps (it´s completely free) and the app GPS Status (have a look to the start of this post) and disconected mobile data ?

Wish you all a happy new year !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!