POST # 1 (original question).
Please ignore this thread. Just testing to see if I can reproduce the behavior described in bjm_'s 28-Nov-2021 post in the thread Message Editor Goes Wonky. Using Firefox v94.0.2 for this test on a Win 10 v21H1 laptop.
This POST # 1 was edited to see if another "Add Reply" Comment box would appear.
64-bit Win 10 Pro v21H1 build 19043.1348 * Firefox v94.0.2 * Microsoft Defender v.4.18.2110.6-1.1.18700.4 * Malwarebytes Premium v18.104.22.168-1.0.1513
Dell Inspiron 15 5584, Intel i5-8265U CPU, 8 GB RAM, 256 GB Toshiba KBG40ZNS256G NVMe SSD, Intel UHD Graphics 620