Do you also have Items and Things defined in files? If so, have you seen the same behaviour?
I upgraded to 4.3 and any change in my Things or Items files seemed to be totally ignored by openHAB - nothing in the logs to say that the Things or Items have been reloaded. The UI would show the old configuration too, despite page and browser refreshes. My usual ‘trick’ wasn’t working.
I didn’t have time to debug so I downgraded back to 4.2.3 (apt install on Debian) and everything worked fine again. I assumed it was an issue specific to my installation, but your post now has me wondering…