New Input System issue with UNet/Mirror Multiplayer

Hello dear people,

i created a multiplayer scene with inputs handled by the new Input System. Multiplayer is achieved by Mirror, which is based on the now legacy UNet as far as i know.

The problem is that only the host player can perform a jump, but all players can move, even tho both of these Inputs should be handled by the Input System. I implemented the two things differently:

For moving, i simply read the vector of WASD/Analog Stick and apply them accordingly to a move function in Update.

For jumping, the Input System is calling a method with the event handler of the Input System.

Here is the Link to the Project (as a zip file), I'm curious if theres just a tiny thing i missed or if this is a legitimate bug.

https://easyupload.io/gz2t74

Also some screenshots of the settings in case you can spot any error there: InputMaster Player Scripts (with InputMaster settings)

Thanks in advance!