There’s nothing we can do with this Docker image, it’s a third party.
We can only help and investigate problems with pure Gatling official components.
If you can reproduce your issue with the Gatling bundle on a Linux box and provide a procedure, we’ll be able to help.
Otherwise, please directly reach out to this Docker image’s author.
Also, it would have saved a lot of time to everyone trying to help you if you had explained you were using a third party Docker image in the first place. That’s why we require a reproducer as explained here.