Thx @Theolitius and @Aslain, i unchecked the SPG log (under non XVM) and went into a match with visible GUI 🙂 Thx for clearing that on up! Have a nice evening!
Same issue as Des_Monia here. No GUI (Crosshair, healthbar, nothing there) after normal start into a battle. Need to close the game and restart into a already running match to have the GUI.