Strange bug with key editor / tempo editing

[benwiggy]

See this thread:

Tempo editing

I’m having trouble with the Tempo Editor. I can add a tempo adjustment with the pencil or Line tool: [Screenshot] But if I try to edit the points with the Selection tool, it goes grey and unselectable. What am I doing wrong? [Screenshot] The points only reappear when (any) notes are selected. Selecting the Tempo Signposts themselves doesn’t help.