Wrong header variable value

I have an issue with swagger-ui for a parameter in headers defined like this:

{"name": "api-key", "in": "header", "description": "api-key", "type": "string"}

The parameter sent by the web browser, is not the one I provided in the interface.

However the display curl command is the right one.

When I do it in private navigation mode, it works correctly.

Have you ever seen this issue?