Do you have the same issue if you follow the OP’s steps to reproduce it?
Provide extra information to complete the original description of the issue:
Once up to around 30MPH it violently veers to the left and is uncontrollable with the rudder peddles.
If relevant, provide additional screenshots/video:
This appears to be on certain aircraft and is more pronounced on some. The Grumman Goose is almost impossible to take off normally.