Service Studio renders Web Block with extreme width and height

I'm not sure exactly when this started happening, but Service Studio is rendering some of our web blocks with an extreme width.

Has anyone else experienced something similar?

The module base theme is Lisbon Theme

We are running platform server Version on-premise using the latest service studio version 11.0.510.0

Hi Hanno,

Is there any logic to this, e.g. all Web Blocks have the same structure, or use the same CSS (that others don't)?

Hi Kilian

Nothing that jumps out, but I am trying to find a pattern. 

All use the same CSS.