The WordPress technical engineers advised the following workaround for posting comments until they can fix the bug.
“We have reported this to our developers and they are looking into it. While we do not have an exact timeline for a fix, I can assure you that it’s on our radar.
The workaround is copying the comment from a text/word editor and then pasting it into the comment box.”
Hobbo and Wormsie, I hope this helps.