I’m also struggling to re-add rests. I’ve attached screenshot showing that Ends Voice and Starts Voice are not enabled in the surrounding bars. Insert Bar Rest (from the barline panel on the right) doesn’t do anything when I click it either.
I removed them with Edit>Remove Rests because it’s a drum part and I was going to just write “Play 8 bars”. But I forgot how I did achieved that before - I should have just moved the multibar rest out of the way with engraving. Not remove rests.
I’ve tried to select the bars in different ways but I can’t seem to. I am able to input new notes though. But then if I delete them the bar rest is not back, it’s the same situation.