ᐅ Is ice falling from ventilation bricks normal?

Hello everyone,
in our new build, we have a problem where ice forms on the ventilation tiles of the plumbing system during freezing temperatures.
When this ice melts, large chunks (about 8 cm x 7 cm x 2 cm (3 inches x 3 inches x 1 inch)) slide down the roof and land on our parking space with the car. This also occurs in the entrance area. We are now concerned that this could cause injury to people or damage to property.
According to our builder, this is not considered a defect, and we were advised to have snow guards installed by a local roofer instead.
What is your opinion? Is this something that is allowed, or is there a standard that regulates this kind of installation?
We were never informed about this issue before.

Thanks in advance for your help!