Problem with communication channels in SAP PI

Hi Experts,

We have a refresh problem with some communication channels in our SAP PI 7.4.

Sometime report that the interfaces are not running, we check the status of the communication channel and is "running". Then refreshing the channel (change description, for example, then save and activate the channel), the interfaces begin to function again.

Any suggestions? What could be happening?

Thanks in advance.

Best Regards,

Briger.