Hi Berndt,
Thanks for the login credentials!
ACSS is the culprit as it overrides the margins (red). I added a temporary “fix” to Bricks » Settings » Custom CSS (green - maybe there’s some setting in ACSS to exclude certain selector from the defaults):
You should report this to ACSS to get it sorted in the long run. As soon as they @layer their styles, there shouldn’t be any issue anymore.