Struggling with understanding some of the behavior here…
I have a tempo equation mark attached to the first note in a new system. It appears directly over the previous barline, in the previous system instead of where it would be expected to be in the new system. I tried this out in another segment of music with no key change, and obtained the same results. Dragging the tempo mark only allows me to attach it to the notes after the first note in the new system. It appears the only way to fix this is in engrave mode?
Yes, for the time being this is indeed the only way. We know that some more options in this kind of situation would be helpful.