Caught Exception while pulsing Offensive

[Zulcon]

When being attacked by NPC pirates in high sec, my miner is having issues deploying drones for defense. It will just sit there throwing Inner Exceptions. I have to manually deploy the drones, set the target and manually engage to get the program working again.

11:38:19 AM | Standard | ModuleManager.TryPulseModule | Caught exception while pulsing Offensive:
11:38:19 AM | Standard | ModuleManager.TryPulseModule | Message: Collection was modified; enumeration operation may not execute.
11:38:19 AM | Standard | ModuleManager.TryPulseModule | Stack Trace: at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at � .Pulse()
at �​.�(�  �)
11:38:19 AM | Standard | ModuleManager.TryPulseModule | Inner Exception:

is the cleanest error message I could find in the logs.