bottom of screen map controls missing for many recorded tracks

Where have the bottom of screen map controls & chart gone for many of my recorded tracks? For example https://link.locusmap.app/t/1dj9o4. The exported GPX files look OK with a text editor. They have only very recently shown this behavior.

Normal controls & chart as shown below. It seems mostly older tracks are OK:

I imported a few GPX into Garmin Basecamp & can't see any issues. And, I'm pretty sure some of the recorded tracks I checked for this post were previously showing the chart anyway. I don't see any recent WebPlanner version change. Of course, I tried ctrl+F5.