disconnect-a-phobia 

The fear of being disconnected after waiting an excessively long time on-hold or being transferred to a different customer service (etc) agent.

After being placed on hold for over 2 hours, my disconnect-a-phobia became overwhelming.

disconnect-a-phobia by Brewmaster Jerry December 7, 2021

disconnectaphobia 

Fear of being disconnected from technology communications (cell phone, email, social media, etc.)

My boss experiences disconnectaphobia when she is on fishing trips in the middle of the Gulf of Mexico.

disconnectaphobia by ilovewords:-) June 24, 2015