• VSCode Version: 1.33.1
• OS Version: Ubuntu 18.04

Steps to Reproduce:

When I start my laptop, I launch two instances of VSCode at the same time (I work on two projects). I do this via a Terminator configuration but it can be reproduced with a shell script:

code /path/to/first/project &
code /path/to/second/project &
wait

90% of the time, I get the following error: "Another instance of code is running but not responding".
Only one instance of code is started after that, I have to manually launch the second one.

Does this issue occur when all extensions are disabled?: Yes, but less often.