I recently discovered that the bbcode (that worked before) is no longer parsing the proper code. I had a chat about this today very briefly in support chat but thought it best to open a support ticket so people could look into this further.
I suspect, based on a prior issue, that Defender might be causing this issue. (WP Social Login needs access to a file and the .htaccess that Defender installs deny's all access to those folders - I had to make a .htaccess for that folder that needed access)
I'm not 100% sure because I can't think of any file that defender would be blocking. It might not be Defender at all and something else.
Thanks for your help