Thanks for your help, thanks for your work.
I wish you strong nerves at users like me
No, the bug is sort of random.
It cannot be expected and if you want an estimate, my sdcard is read 90/100 when I power on the device and a similar estimate, about 95 times on 100, my sim card is correctly recognized.
I am not able to find the problem, I am almost a Mechanical Engineer and Android is not my field, I am a Linux-world lover, so Android too!