Description
As detailed here: xJon/The-1.12.2-Pack#963

The symbology book and the mystic branch will show the wrong strokes and the wrong spell being cast if the client's config mismatches with the server

Environment

[ X] The issue is present in Multi-Player
Other mods
[ X] The issue is present with just Forge and Witchery: Resurrected

Steps to Reproduce
The more detailed is provided, the easier will be to reproduce and analyze the issue, thus more chances to solve it

1. Disable a list of spells in server config, personally tested with Aguamenti, Avade Kedavra, Defodio, Expelliarmus, Flipendo, Incendio, Stupefy, Ignianima all disabled
2. read the symbology book and compare to what they should be
3. try cast the spells it says to cast, or cast a spell you know the actual strokes for and see it show the wrong one

if the client's config mismatches with the server

This is usually solved by config-syncing. This feature by itself is non-trivial, and for a mod like Companion, this would be even harder as I cannot do major changes to the Witchery inner workings. A workload that I'm not willing to take for an edge-case like this, as most player will download and play modpacks as they are out-of-the-box, sorry.

If you have specific needs for having the same modpack with two different configs, apart from having two different instances, I might suggest symbolic links to avoid having duplicates of the whole instance, and instead have two instances that point to the same folders expect the config folder (of even, only the witchery config file)