This is common with android. In my past days when I was endlessly flashing my phones, it was advised to do a factory reset after the flash to clean all parameters and caches. I still do it with my daps ( X5iii and M11) and no problems, only to reinstall apps. That was my 2 cents

Placed an order for M11 on Amazon last thursday, received it yesterday, seller AVshop, nice. First listening this morning, and coming from an X5iii, it's incredible the difference ! First the power, with Fiio F9 Pro, at 61 on X5iii sound level is lower than M11@51. With the X5iii, I didn't like...

It's a pity they don't make it possible. I don't put anything on my card, but everyday I have to wait for this ! On the Fiio you can decide to update it manually ! Grrr

Is there a way to cancel the library scanning at each startup ?