I’ve been digging through some old Git branches and wikis where I keep half-finished experiments and unpublished work, to pick out things worth another look. Came across a little plugin that lets you save a tiddler while editing, without closing it or losing your cursor position.
I haven’t tested it extensively yet, but it seems to work fine. Sharing here in case it’s useful to others. Please backup and test with the utmost care: Saq's Sandbox — Experimental doodads
Could you provide step by step instructions for recreating the problem? I just tried it at https://tiddlywiki.com/empty.html and at a quick glance, I could not recreate the problem.