Yes there is a working re-boot button under > Maintenance > Device > Reset > 'Please click the Reboot button to reboot the device'.
Reboot
I have used it from my UN-locked HG612 web interface many times on my very long ADSL2 line I use for monitoring 24/7 with DSLstats
http://www.s446074245.websitehome.co.uk/index.html
Out of interest about your 'ubiquiti link ' how far does the link go ?, is it a good solid link all the time ?., What model / spec is it ?.
Edited by APTMAN (Wed 13-Jan-16 23:38:26)