Are you using Firefox? This has been a known issue with Froala (Xenforo's editor) and Firefox for a while (i.e. pre-2.3.7). I am now a Firefox user and learning to live with it but, yeah, hope the move to TipTap fixes it. Chromium browsers (Chrome, Edge, and many other browsers nowadays) are unaffected, or at least were prior to 2.3.7. I haven't tried in a Chromium browser since the upgrade.