Hi @Grug,
Thank you for reporting this!
Indeed, there was an issue with copy/pasting certain styles.
This should be addressed in 1.2.9.4.9.
Please let me know if this is the case on your end.
As for the pasting, there now is a small popup where you can enter the pasted style (you should not have to paste twice).
This was implemented to enable cross-site copy/pasting.