Been chasing this one down for a few weeks and I can finally reproduce it.

Locked containers can cause the script to enter a state where It can not place any items of that type into an unlimited container.

Reproduction:

1. Build 3 containers, Link them with conveyors and take ownership
   
2. Tag one as [TIM Locked]
   
3. Tag one with an unlimited request ie [TIM Motor]
   
4. Tag one with a limited request, [TIM Motor:10]
   
5. Fill any of the containers with the item, enough to overfill the limited request
   
6. Place at least 1 of the item that was tagged in the locked container

Actual Behavior:
Debug panel will report there is no place to put the items in surplus of the limited request. If using 1000 motors in the above and 1 motor was placed in the locked container then debug will report no place for 989 of them. This will cause TIM to stop functioning for that item until the either the locked tag or the limited requests are removed.

Expected Behavior:
TIM fills the limited request, does not removed anything from the locked container and placed any surplus in the unlimited containers.