Jaime Alvarez
Regular Contributor
It sounds like the "stability" issue you are having is what alot of people have reported. The webui doesn't respond but the router itself still works fine. I recommend using a tool by the great @Jack Yaz called scmerlin. That script includes the ability to restart just the web browser (or other services it you need).
Edit: https://www.snbforums.com/threads/scmerlin-service-and-script-control-menu-for-asuswrt-merlin.56277/
Aha! This is what happened to me so I went back to 384.17...