board-name: RB5009UPr+S+
version: 7.5 (stable)
ether1 connected to ISP modem (XB6) advertising 10/100/1000M (not advertising 2.5G)
sfp-sfpplus1 connected to CRS326 sfp-sfpplus2 via XS+DA0001
USB connected to APC UPS (UPS package installed)
I am able to get my RB5009 to hang on reboot when connected both via SSH and Winbox.
If I issue a /system/reboot command from the CLI via SSH while also connected via Winbox, the router does not reboot and hangs with ether 2 dimly lit.
I have to pull the power plug and reconnect power in order for the device to boot.
When I reboot via CLI while not also connected via winbox, the router reboots without issue.
When I reboot via Winbox without being connected via SSH, the router reboots without issue.
I have experienced no other problems with this device.
I am wondering if anyone else is able to replicate my findings.