Since updating to Joomla 6.0.3, when I try to add or edit a new article as an administrator, the "Content" tab starts jittering and won't let me.
This only happens with Windows 11 and Mozilla Firefox; it doesn't occur with other browsers or iPadOS. This happens in all applications that use Joomla. I've reported this to my hosting company's technical support, and they've also reproduced the error, but they've ruled out a problem with their server. If necessary, I can provide the precise details needed to reproduce the problem.