I'd check the rotor thickness. Magura recommend replacing the rotors at 1.8mm (I think), which is basically the starting thickness of Shimano and Sram. Your rotors may simply be too thin. A quick Google search shows that they have a spec starting thickness of 1.85-2.05mm.
July 20, 2018, 2:09 p.m. - Andeh
I'd check the rotor thickness. Magura recommend replacing the rotors at 1.8mm (I think), which is basically the starting thickness of Shimano and Sram. Your rotors may simply be too thin. A quick Google search shows that they have a spec starting thickness of 1.85-2.05mm.