No, not the frame but the actual text inside is getting squeezed/stretched as the frame changes.

Update: I realised I’ve asked this before and I have an answer. My memory must be having an off day.

I have a suspicion the problem is bigger than InDesign. Considering an erase and assemble everything from scratch.

There’s no error report. InDes just bounces for about 5 mins then stops. The Activity monitor shows hardly any activity.
I don’t have any fonts active or font apps open (I use Font Explore X Pro to manage my fonts.
How do I get a different language version if InDes? I haven’t seen that option listed in the Creative Cloud Installer.

I’ve used that before, but never knew that it respected the bleed too. This might just work. You are a brilliant for sharing this gem. And thanks to David for the content.

This is more of a decorative element to the document so the normal rules about typesetting don’t apply. I have a hunch the answer lies in some GREP magic. I have the ‘GREP in InDesign’ book but can’t find any hints about how to instruct something so specific as ‘find every 300th character (including slashes, numbers, punctuation etc) and add a line break.’