Yes , got this problem also.
I managed to have 1 battle with them being friendly, after the battle back to hired enemies...
Strange thing is i havent seen this bug reported in the bug section
Hello folks,
I'm wondering if anyone else is having trouble with the hirelings you hire from the stronghold's barracks
They appear as enemies when i visit my stronghold forcing me to engage in combat and kill them every-time
Thanks for your time