AXR4U MIDI does not initialize on cold boot (Windows 11)

Hi everyone,

Since some time I have the issue that my AXR4U does not initialize the builtin MIDI interface. I have my old beloved Steinberg Houston connected to it, and every time after I boot my computer, the MIDI interface is absent. I have to reboot the computer for the MIDI interface to be available again.
I’m running Windows 11 Pro with Cubase 15 (latest version) and the latest version of the AXR tools and Yamaha driver.
Does someone have an idea how to solve this?

Best, Rob