MacBook Air M3 will not type in certain forums and text boxes...

I didn't notice this was an issue until when I tried to answer a comment on reddit today, and the keyboard stopped responding when typing. but just in the comment box. It still clicks links etc... It happened a few days ago but not sure if it was the same site. And it's not all over the site just certain random times on different pages. Tried it in Firefox and Safari and same result. It will put the curser in the comment box but nothing else. This is so weird and I am wondering if I have done something accidentally to cause it, but as it is random I don't see how. Running latest OS.