fortinet is garbage kit...its the Australian Version of TP-LINK.
There are all sorts of problems , right from their earliest implementations , we battled with endless bugs ,strange behavior, 1980's version GUI and in the end we dropped their kit completely, due to their attitude of , well we shipped buggy OS but you still have to pay, despite hte bug being there from years before your support contract ended.
ALL companies should be responsible for "free fixes" to their kit, if bugs existed, it's time we grew up and stopped allowing companies to get away with this endless bullshit of
"well you need a support contract before we will give you the fixes for our own mistakes"