Control Stations can stop responding to actions, and will not reover from this state until power cycled. It happens when radio is used in Select 5 networks.
This is known issue and can be fixed with a simple setting:
First, set Auto Reset Timer to Enabled on all Select 5 telegram decoders.
After that, pick Carrier Independent option on all Select 5 channels on RX settings:
With this settings the issue will be fixed.