After this waiting for mastery unlock I put point into relentless.
Then I hit mastery unlock try to spec out from relentless but a message appear"You have point in Iron mastery, which requires this node to have at least one point in it".
I don’t know if I was supposed to have point in both and it means that the bug was me putting point in iron mastery at first or if the bug is the impossibility to respect but there is something odd.
If you’ve got points in both Armour Clad & Relentless then you should be able to respec one & it still be valid. This would be a bug if that’s the cause of the message.
However, if respecing out of Relentless would cause you to drop down below 10 points in Sentinel then that wouldn’t be a bug as the point in Iron Mastery requires you to have 10 points in Sentinel.