Not sure about this....there is no rule that pertains to this as it is procedural.

Proposal/New rule: When rider(s) miss third call and start from pre grid for a 2 class race, they are to be released at the end of their class/group. NOT at the end of the entire grid. Case in point, MWEND/LWEND rider is in MW and starts at pregrid. Said rider(s) will be released as the last rider in MW passes whatever plane/line/corner that would effect a normal release as it is set up now. Instead of waiting for LW to pass. It is with regard to safety that said rider(s) are allowed to be at the back of thier respective group without interfering with the slower group they would be merging into.

The affected rider(s) are still penalised by being at the back of their respective grid (same as a single class race) and in front of the slower group thus not causing issue at the start of a race where the group is bunched up tightly.