Hi Sam, thanks for your reply.
I’m using Chrome Version 138.0.7204.157 (Official Build) (arm64). I haven’t tried it on other browsers yet. After struggling with it for a few days, I realized this issue happened when I copied content from Gemini (which I used to help improve my writing) and pasted in the composer. Perhaps the formatting from Gemini messed something up, causing all of the issues I mentioned in my previous post. This didn’t happen with the previous composer version.
When I pasted the text from Gemini to another text editor first and removed more all the formatting before pasting it on Discourse composer, there was no issue.