Wow this worked for me too.
What is odd is I had some reverse proxy certs change when i was setting up a CName for my onlyofficeds container with my reverse proxy. Pretty sure thats how they changed anyways. I ended up blowing the whole only office document server container away and deleted all of its appdata as it seemed like the certs were being cached or stored somewhere else after they were first used.
Then I repulled the docker image and remade the container and applied the latest certs to only office from my proxy.
Then I ran into the health check errors in nextcloud. I'm confused why not deleting the certs in my only office container after all of this solved it lol
Thanks