It looks like I have solved it! In a very sophisticated and technical manner 🙂 .Somewhere I read the suggestion from Allo to disassemble all and to assemble the DigiOne with the Raspberry again. I have done that and restarting looks stable now. I have rebooted Max2Play 4 times now and everytime I have a running SqueezeLite and music. Like it should 🙂 ..
For the ones who are interested, Max2Play with the Allo DigiOne is a great combo. I had the HifiBerry Digi+ Pro, but the DigiOne sounds a lot better, so the HifiBerry has been sold already..let’s keep fingers crossed that the solution found is a definitive solution. If not I’ll come back.