actually doesn't take very long. just go to ashran alone, aka don't join a raid, and take insignias from dead players. you get tokens that you turn in for 2750 rep. if you're in a raid you have to roll for them
As you can see in the screenshot, it's still on bar 1. I haven't seen any lua errors, but I haven't tried disabling all my addons because it's so random that I can't be sure that it works. Sometimes it's fine for three hours and then it goes back and forth 3 times in like 30 minutes.