17.01.5 reboot command doesn't work

I installed the official 17.01.5 on my TP-Link Archer C2600.
I noticed that the reboot command doesn't work at all. The LEDs are turning off and that's it. The router isn't rebooting.

That is a known issue with hardware revision 1.1 of your router, which has been fixed after 17.01; as in, it is fixed in 18.06.

That's interesting since I've been using 17.01-SNAPSHOT for a while now and I didn't notice this issue before. Can you maybe point me to a patch?