Orange Pi 2+ crashes frequently

Hi,

I recently reinstalled an orange pi 2+ with Armbian Stretch mainline kernel 4:  

root@ted1090-7:~# uname -a
Linux ted1090-7 4.14.18-sunxi #24 SMP Fri Feb 9 16:24:32 CET 2018 armv7l GNU/Linux

I also installed it on EMMC (this way, with this u-boot-sunxi-with-spl.bin). 

Now this orange pi crashes every couple of days (sometimes with a couple of hours). 

This orange pi use to run with Armbian legacy 3.x kernel on EMMC without any issue:

pi@ted1090-6 ~ $ uname -a
Linux ted1090-6 3.4.113-sun8i #18 SMP PREEMPT Wed Jan 24 22:10:49 CET 2018 armv7l GNU/Linux

Exactly the same applications are installed (dump1090 and dump1090-tools).  The applications do run okay until the orange pi crashes.

I have several more orange pi's 2 +, running exactly the same software on the Armbian legacy 3.x kernel installed on EMMC without any issue.

I would like to know why my orange pi crashes with the Armbian Stretch mainline kernel 4?

I monitored the files systems and searched the log files for a reason, but I didn't find a cause.  Does anyone know why I pi crashes?

Here is my system info: http://ix.io/1lxa

root@ted1090-7:~# armbianmonitor -u
System diagnosis information will now be uploaded to http://ix.io/1lxa

Kind regards!