It is still present, but it is not bothering me any more
After some experimentation, I presume it is related to the entry mode (app settings)
If I start a new composition, and use “table”, everything goes fine. I can copy and paste.
If then I change settings to “text” it does not work any more. I can copy, but cannot paste except at the end of the piece, and only if there are enough free measures. (sometimes also works when I create enough empty measures at the end)
I have “auto add measures” always enabled
When I go back to “table” it works all right
What I have done is just ignore “text” mode
Thank you for your interest