I tried runstr too (but for hiking). However it has no background notification so it randomly stops quite often. I'll give it another go once updated.
Discussion
I had a problem with it doing that at first and it is still has quite a few bugs, but they update it pretty frequently. I went in and removed battery optimization, gave all permissions and haven't had that problem since. Maybe a long hike might kick it off though, my runs are usually in the 45 - 1 hour range.