Text Source unreadable when Modifying

When modifying an existing text source unable to read at all we are running 4.1.2104.2312 and plug in is up to date text source

Hi there, may I ask when do you encounter this issue? Can you provide us a short recording showing how you are able to replicate this?

When doing this, go to Advanced tab and enable enhanced logging then click on Apply to save changes as this would generate logs when replicating the issue.