Because that I have seen, that there also some kernel related bugs, it would be nice to see what your RPi reports at the boot diagnostic screen like this:
Please try it without the SD card inserted and post a picture of it. It makes it much easier to understand what the current bootloader is trying.
And please check which kernel version is in use if you boot from SD card and compare it to the kernel from the network boot you used during installation.
uname -a