Ubuntu 19.10: calc paste figure instead of cells

Hello
I upgrade to Ubuntu 19 and now Calc is pasting an image instead of the selected cells. I am using a mouse with 5 buttons and running the file ~/.xbindkeysrc to link the command to the mouse, with the content:

"xte 'keydown Control_L' 'key c' 'keyup Control_L'"
b:9

"xte 'keydown Control_L' 'key v' 'keyup Control_L'"
b:8

With Writer instead, I need to copy twice in order to get what I wanted to copy in the first place.

What could be the cause?

ADDENDUM: I have Calc on several machines, including a chromebook, and this problem is present in every copy. Looks more a bug than a problem of my machine…