Connection between Postman and target lost after approx 1 minute

When I execute following steps I am no longer able to communicate with my target.

  • send command via Postman to target
  • receive response from target
  • wait for approximately 1 minute
  • resend same command via Postman
  • Postman reports timeout error

If I close Postman and restart it I can immediately resend same command and receive data from the target again.

If I use VS Code with the Postman extension Postman keeps working even after 1 minute.

I prefer not to use VS Code, so what can I do to solve this?

Postman version 11.35.4

Postman version 11.2.14-canary01 on the otherhand works fine.