Hopefully this isn't a problem that only happens for me. I'm using Firefox 87.0,2, and these screenshots were taken with no addons/themes/etc enabled.
Step 1: Click the text box to expand it.
Note that you cannot actually type in the text box (notice the lack of a formatting bar).
Step 2: Click under the text box, around the same "line" as the Post comment and Attach files buttons, revealing another text box.
Step 3: Repeat as desired for as many text boxes as you like.
This is not exclusive to replies to other Profile Posts. It also applies to the Profile Posts themselves, and only the contents of the last text box are posted when you click the Post button:
This doesn't seem to be an issue in the forums themselves, just the Profile Posts section. It's just an unexpected glitch, not really a problematic bug, but I thought I'd mention it anyway. I don't have a Chrome/Chromium browser or even an older version of Firefox available to test with, so I can't determine whether it's exclusive to this specific version of Firefox or if it occurs with other browsers and/or versions of Firefox.
Step 1: Click the text box to expand it.
Note that you cannot actually type in the text box (notice the lack of a formatting bar).
Step 2: Click under the text box, around the same "line" as the Post comment and Attach files buttons, revealing another text box.
Step 3: Repeat as desired for as many text boxes as you like.
This is not exclusive to replies to other Profile Posts. It also applies to the Profile Posts themselves, and only the contents of the last text box are posted when you click the Post button:
This doesn't seem to be an issue in the forums themselves, just the Profile Posts section. It's just an unexpected glitch, not really a problematic bug, but I thought I'd mention it anyway. I don't have a Chrome/Chromium browser or even an older version of Firefox available to test with, so I can't determine whether it's exclusive to this specific version of Firefox or if it occurs with other browsers and/or versions of Firefox.