For a while now, when I post, where my post shows one blank line between paragraphs, what gets parsed and posted shows two or three blank lines.

I can catch it, and fix it, if I go to "preview post" before submitting. But if I add anything from that page, it will have the odd spacing too.

For reference here, I have left only one blank line between each paragraph. Which is to say, after the last period in a paragraph, I press "Return" twice.

I am using Firefox 69.0.1 on a mac. I also have uBlock Origin blocking ads and trackers, which has never been an issue here before - and the issue persists if I turn off the blocker.

My message editor is the Enhanced Editor with WYSIWIG editing. This issue is replicable on at least 2 forum skins ("Psych Central" and "Teal/Black").

I don't post often, and I don't know when this started - I have a feeling it was around the time of the switch to the new domain, but I can't be sure.