@tapioI still think that this setting "Fill elevation" is usually not needed to change and if, then definitely with awareness. Yes, you may re-import your data if you notice this problem on time. You may also by accident overwrite more precise data then Locus is able to generate without notice. So I still consider manual selection and in case of need, later manual "Fill elevation" as a better solution.
Modify track with many waypoints: eh, you just do editing and during that process, device turn screen off?? App crashes and it happens since "ancient times" (@Christian)? Am I aware of it? A better description for simulation is welcome, thanks!
@Christianproblem with generating preview sound quite complicated to me. What means "start Locus from side panel"? Maybe the video of this process is possible?
Display additional track ... click billion times?

. I see that first back press display list of folders and second click than return to the previous track. So maybe the first click does not work as before? I'm checking the app source code and see no difference, hmm. Anyway fastest how to display new track, same as with points, is to tap on track overview. This immediately display track on the map and return directly to the map screen.
@jonny.blueanother interesting problem where I see no difference in code (last edit before 10 months), but the same issue happens to me as well, interesting. It will be fixed in the next version, thanks.