I don’t have many BT devices, so my tests are short 
I have been using the my FP with the 15.1 build and the Aftershokz Trekz Titanium Bluetooth earphones.
Pairing works well, connection works and playback (with Spotify) does also work, but the playback stops irregular after about 15-20 minutes. I have to wait for a few seconds and press the play button on the headphones again and the playback continues (but stops again afters some time).
I’ve used in my car, no difference in performance either with phone calls or playing media. I had the problems described by @Pitey with 14.1 but not played media long enough yet to know if it continues as described for me
Right, I forgot that, I had the problem als with 14.1 but definitely much less.
I have a commute of about 45 minutes, with 14.1 it stopped maybe once in 2-3 days. Now (with 15.1) as described every 15-20 minutes.
I suspected Spotify as the problem and added it to the “Not optimized” apps in the battery settings, but the problems remains.
What is a normal value for cell standby in the battery statistics? My battery is at 70% right now and 17% are used for cell standby.
Build installed via TWRP 3.2.2-0 (Releases)
lineage_FP2-ota-7a81fd13c5.zip
Security patch level: 05 Jul 2018 (Settings - System - About phone)
Vendor security patch level: 01 Apr 2018 (Settings - System - About phone)
The following things work for me so far:
Ok, I’m counting on you, this is my daily driver for now 
…
Strict confirmed.
No issues for me with this build.
Doesn’t work for me, step 1/3 seems to hang forever supposedly fetching data from the sensor.
I checked Kernel Adiutor with the “Apps and ADB” setting … works as intended. Asks for root and works when granted.
Can’t confirm this with this build. Which website was it?
I thought I had this, too … but then I activated more repositories and this was gone, F-Droid was showing the installed Apps correctly then.
I’m more with @Stefan here. The stock file manager doesn’t install APKs from Internal Storage and it doesn’t ask for permission to do so … but it does install APKs without a problem from SD card.
Confirmed.
Doesn’t work for me. Do I need to enable this first somewhere I didn’t see it?
Confirmed, doesn’t work for me, too. Reboots into LineageOS.
New camera modules … but then it was working in LineageOS 14.1 with them.
I also don’t have such devices.
So…finally!!! Almost everything works. I can confirm the following:
Update: Proximity calibration tool does not work. I can confirm that. It gets stuck in Step 1/3.
i have tested ant+ and with the garmin watch and scale it works perfectly.
Hello !
Reboot into recovery doesn’t work for me, too.
Initially, only simple Reboot button is there, one has to activate “Advanced reboot” in “Developper settings” to display the 3 options.
Android “Trust” complains that this version is signed with public keys. Is that normal and inherent to the fact that it’s an unofficial test build? I assume this message will disappear once we’ll migrate to official LineageOS, right ? 
Note that this notification can be avoided in Settings > Security and Confidentiality > Trust > Version signature
hey, quick question, i read that a download issue is fixed, the thing with owncloud works now? 
Yes, owncloud works for me as expected.
I installed on Sunday, no problems until today.
For some reasons I wanted to deactivate SIM1, which SEEMED to work, it wasn’t shown in the status bar any more. Nonetheless WAS it working. I recognized this, when someone was calling me on SIM1, which should not have worked at that time. So when I deactivate SIM1, it just looks like it is offline, but it is working in the background.
And: LTE on SIM2 was only working after telling SIM1 to use G2 (didn’t try G3), I knew this was the case in some earlier Open FPOS version, but then you could only chose LTE for one of the SIMs. Here you can select it for both, but it is not working for SIM2 until you deselect it for SIM1 (even when SIM1 is not using mobile network at all).
I’ve had a weird situation today where despite all the notification/ringtone volumes being set, my phone would not ring or play notification sounds. I tried using DND and then disabling again, but no sounds were played. The phone would vibrate, but as I said the volumes were set correctly.
A reboot has resolved on this occasion.
I can’t reproduce here. Playback with Spotify to a Bluetooth speaker works fine over long time.
Can you post logcat when this happens?
Chris
I tested Bluetooth playback with the stock music App for approx. 40 minutes each before stopping it myself on a Panasonic RF-D20BT radio and a Marantz NR1508 receiver … no problem.
I don’t have a Bluetooth headset or Bluetooth headphones or Spotify, though.
New build. Built from incorporating lineage review comments. Also fixed (hopefully): Proximity Sensor calibration app.
Chris
Seems to have fixed it for me. Went through all steps and rebooted sucessfully
Thanks a lot for your hard work, not missing a thing from my old OS everything seems to work so far
I can confirm that as well. It works fine now!!!
I can confirm that as well. I do not have spotify though. I paired my FP2 with my UE Boom and the playback through “Radiodroid” worked perfectly for about 25-30 minutes. Then it stopped. I then had to press the play button again.
Since yesterday, daily driver for me as well 
I put those shortcuts that I had before and consider useful