Users Moving to PAS even though it is not in load balancing

hi,

We have the scenario where the User are going to the PAS although it is not configured in any Load balancing . Though logs we identified that users/RFCs are initially going to AAS only, but later there connections are getting moved to PAS by the application . This is casing issue as because  of this the CPU is reaching 100% and as DB is also on PAS , it is jamming the application .

Appreciate suggestions .

Thanks

Jatin