Try netinstall using backup bootloader if that makes any difference.
Another possibility is the caps on the board got old and dry and PSU can't supply the CPU under load... so it reboots. But why it was working properly before... hard to say.
That looks like a memory leak. When it gets really high, make supout file and send it to the support. They should be able to find the culprit and fix it.Stable has usage about 60Mb and this version is just raising up with no limits.
Spectral scan is function of wireless radio chip. Mikrotik uses the cheapest versions of the chip that simply can't do it, no amount of software can fix that.i've been asking multiple times about Spectral scan, i want that features to be implemented on 5 mhz
PXE boot: That's really nice to have, it makes installing on remote system much more easier.Or You can download netinstall-7.0beta5 and install via PXE boot (feature added as of 7.0beta5).
If you see only TX increasing and zero for RX, LAN is probably fried...If I run /tool torch interface=ether1 it shows somwthing on TX and TX-PACKETS
I really REALLY hope this is not true, that just one developer is responsible for all wireless drivers in ROS.Only one single developer from MikroTik "Reinis" knows when he will finish his own implementation of MU-MIMO ...