When you cling on a wall and try to jump up while wearing an elytra, it will activate the elytra and boost you up into the air

Minecraft Version: 1.20.1
ParCool Version: 1.20.1-3.3.0.2

I am using other mods and have not tested it with only parcool, but I don't believe they are the issue as I don't think any of them alter elytra flight

I tested but I cannot reproduce the phenomenon with latest version. Could you try v3.3.0.4?
Or are you using Aileron mod together? Once similar problem was reported with the mod before

I found the issue, it's an incompatibility with caelus api