Think I stubbled upon a bug. (version 22.214.171.1248)
After making two music frames (instead of one) on the -First Master Page-, the first page switches to -Default Master Page- instead of -First Master Page-.
As soon as one of the music frames is deleted it automatically jumps back to using the -First Master Page-.
It can be overridden thru a -Insert Master Page Change-.
There is also no change when choosing different options in -Layout Options/Page Setup/Flows-, -Use ‘first’ master Page-
I thought I might be something with the file (imported from v2), but the problem also occurs in brand new files.
Would be glad to hear if I am missing something, or if this a bug, thanks!
All the best,