Ok it seems that pacman was the culprit here, not tor.
I had a torrc.pacnew file which was causing the problem. I managed to fix it by doing the following:
mv /etc/tor/torrc.pacnew /etc/tor/torrc
Then I just added my personal configurations to the file
Unfortunately an old issue. Moved and closed several times but still not resolved:
Distribute IPv6 bridges through bridges.torproject.org.
BridgeDB so far only works for IPv6 vanilla bridges.
I have 2 IPv6 obfs4 bridges running in Germany. If you want the IP's mail me (+gpg-key) or use keybase.