Yes, we had two riders with issues. One is the one @finnspin talks about - at a pretty high level, the second rider landed 1,5m drops with brake tightened - which is nearly the biggest load a tab can get. In addition, both riders used downhill-4-piston brakes (Saint/Zee, or Trickstuff) and both 203 mm rotors. Also, on both this happened after quite some riding time.
Compared to the total qty - it is really a little count - and certainly due to the really low weight of the frame. It is always a compromise. But as Finnspin says, we prefer to recommend 180 mm rotors max.
On the other hand, you have riders like @Becky98 riding thousands of kms with a freewheel-unicycle on the #rgb frame. But it is clearer to recommend a max. rotor-size than to say “do not land while braking”.
We reinforced this part in future productions - which will be a running change - once through, we will adapt this recommendation - until then, we recommend not using more than 180 mm rotors. This is more clear than silently accepting claims of broken frames - it’s about safety in the end.