Interference check Pipe network

https://preview.redd.it/swbdbgm7t2yd1.png?width=1866&format=png&auto=webp&s=6b84f509b1346c89a5657807862449e69082f5cf

Every now and then when I run a interference check it seems to bug out totally. In this case I´ve set the rules for 5cm and it marks alot of places that are 15-20cm or even more? Is there any pipe network setting that makes this happen or what could be wrong?

I´ve tried -purge and audit.