AI stupidity obersvation

I heavily use WOAI's A/Cs to represent local traffic when I fly into and out of KDFW. Unfortunately on occasion the AI wigs out and either has a plane taking forever to exit runway or holding short due to other taxiing aircraft and never moves on. On one occasion I actually had to over shoot a runway because AI was in position and holding on the runway I was landing on. ATC never gave a go around, so I overshot the TDZ and made a less comfortable landing.Does anyone else experience any sort of wonkiness with AI aircraft?