This bug can seen if you have a Foundation Control Station running software v126.96.36.199 or earlier and you lose all communication to the hoists on a single data run (either Com A or Com B). This is caused by a hoist name with more than 18 characters.
Example: Barney's Chili Hacienda.
The motor can only accept a name of 18 characters or less. If a name is more than 18 characters the communication between the motor and the controller overload the communication line and cause a data storm.
Reducing the name length to 18 characters or less should clear up the issue.