Web terminal is not always opened successfully

This bug was found on AWS from branch epm-v2.3.0  (It has not been checked on Azure/GCP). This bug was found on GCP as well, in some minutes (after login) terminal could not be opened successful ( branch-2.4.0). If user opens terminal right away after login the terminal opens successfully.

Preconditions:

1. Notebook is created from branch epm-v2.3.0

Steps to reproduce:

1. Open Web terminal

Actual result:

1. Web terminal is not always opened successfully

Expected result:

1. Web terminal is always opened successfully

This bug was reproduced 29/07/2020 on AWS

This bug was reproduced 07/10/2020 on AWS from develop branch