@hube2 ah excellent, this explains why I didn’t have the issue locally, since I’m not running MU locally. I’ll try this out and close the topic if it works, thanks!
@hube2 it is a textarea field type. I’m not sure the exact answer to your second question — I guess we’re using the older style editor and not Gutenberg? Here’s a screenshot anyway, with the field at the bottom, showing what I see after saving (script tags removed): https://www.evernote.com/l/AD-gkCiwZVVKuLS14902esj08jJiqAt2-bY