Problem with tempo lines in part

I prefer using dashed lines with tempo indications, i.e. accel or rit. In the part the lines do not show up. If I delete the accel or rit and then hit control+z it reappears with the line. Is this a bug?

I think the issue here really is that the properties that define what kind of appearance the gradual tempo should have are independent between the different layouts. This is something we need to work on and it’s a high priority for our next major release.

Thanks Daniel.