For what it’s worth, hopefully this can help other leagues and or the devs fix the problem. Myself and a couple of guys from my league did some testing to figure this out, and we feel fairly confident that the issue is linked to qualifying.
Through multiple testing sessions, it did not matter if qualifying was wet or dry. Anytime that we added a qualifying session, during the race random members would have access to Hotline mode while others were limited to medium, or none we tested with different people using hot lap or not using hot lap during their qualifying runs, as well as mixing up, set up modifications and race strategy modifications prior to the race, and there was no clear correlation between who would have access to hotlap.
Anytime that you only do a race session. It is far across the board in the sense of every member is limited to none or medium the workaround that we have figured out is you basically run a qualifying session, retire from the race, then reset the starting grid without qualifying based on those results. Hopefully with knowing that it’s linked to qualifying, they can make a hot fix for this.