My RB4011iGS+5HacQ2HnD-IN... 5G down for unknown reason, there is nothing shown in the log as well.
Running 6.44 for 4 full days, and only just happen a moment ago. After reboot, everything back to normal.
/interface wirelessCould it be that 5G radio channel is set to auto and that the selected channel is not supported by your device? Or that it was in a DFS waiting state? Perhaps you can share your settings?