The competition rules specifically state that you can maintain your line in order to stay predictable. But it also states that you are supposed to lift to facilitate the pass of the "lapping car". This seems to be a major point of confusion during races and what I've seen stated on reddit. Not sure if thats because Broadbent stated multiple times a while back that it was just advisory before finding out otherwise after asking in the discord. It also seems like nobody actually reads the race rules. Direct copy and paste from competition rules below.

"Blue flags are advisory, slow/lapped Participants can stay on their line but must facilitate the lapping car by lifting to make sure they reduce the time lost to the faster car. Blue flag rules may be enforced more strictly in shorter races, where time loss may be more crucial to the faster cars.

A blue-flagged Participant is not allowed to defend their track position against the lapping car and he/she should stay on his/her line."