I tried to get as much out of OP’s overflowing lines as possible.
What I would do (but I’m not an RPG player):
- Deactivate all plugins that were not updated for a long time (you can start on zero; rename community-plugins.json file to something you can find later).
- Index vault with Omnisearch disabled (you can try re-enabling it later).
- Before indexing I would delete the whole config folder (not the personal one such as
.obsidian
but the one I talk about down below).
In this post I was talking about similar things but here I am hinting at a complete erasing of the contents of C:\Users\<username>\AppData\Roaming\obsidian
– start with a clean slate. You can leave your Custom Dictionary.txt in there if you like spelling errors overruled.
You can install 1.5.12 and try out the (newer) plugins that work. I mean, Obsidian will get to 2.8.5 one day and you want to stay on 1.3? Or get a Linux install on dual boot and use a fresh install there.