Digi+ Pro is not recognized on cold start or as DAC+ Zero/Light/MiniAmp

after shutdown, power disconnection and re powering the module is recognized without any problems.

HiFiBerryOS version: 20210203
Pi model: 4

As comparison: i also tested the dac2 hd on this pi without any probems/errors.

Is this an hardware eprom bug in the hifiberry Digi+ Pro module or is it a software bug? How can i modify the HiFiBerryOS system to force the digi+ pro driver in the config.txt? Is there a way for me to re-flash the eprom of the module if something is wrong with it ... or is the eprom defective and must be returned ?


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