Thank you for your reply. My region is japan, I am also connecting to a Japanese server (Shinryu)

I recently resubscribed and it has been happening since then. There were no issues before, and there does not seem to be any issues on my other character on a different server. (Leviathan)

There were no changes in the time since I started playing on ps5 network wise

Regarding erroring out, the issue occurs as such:
Log into game, go to character select screen, select character, wait in queue, loading screen, then sometimes it loads in properly, other times it sits there for 10-15 seconds before getting the 10105 error. This happens in Shinryu server, character Maki morales