first about the new feature: Sorry I forgot this late at night. I like the chart with display of selected x-axis and the colored points! Thank you!
Setting altitudes offline:
I made similar expirience...
After recording the track on my way home, which was more accurate than the last days (improvement in release?!), I selected to set the altitude offline for this track. Locus crashed (just disappeared after standard crashpopup). I was able to try it a second time with offline altitude and it crashed again. Next I tried with setting altitude online: Worked. And after this, even setting offline altitude worked again.
And also a new track works with setting altitude offline now (so problem not reproduceable any more).
Time of routepoints:
The manual edited routepoint in troute has its time from last edit. I edit by selecting the routepoint in the route and click on the tools-symbol, choose "new" at the coordinates and select it from map. I can reproduce it that way. Even after setting altitudes, this times stay as they are. So in the chart I see then an altitude curve (for this one point).
My workarround for the "time-equalizing" is to set times manually (second by second) in the gpx file and reimport in Locus again. Then I get my fine altitude-chart of the created route. I'm glad I'm not having much routes to create ;-)