I recently had a second occasion where I prepared a reply to a post, with a guote, and the quote disappeared when I posted. Here’s the thread.
https://largescalecentral.com/t/imax-b6ac-deluxe-lithium-ion-charger/83674/34
It started normally, like this:
and ended up looking like this:
To fix it, I had to re-quote the section of the post in a new ‘reply’, cut it and cancel the reply, edit my original post and paste it in.