Should be fixed. Will be applied after update.
I have completely changed the way this tram used to work in this raid. Players can now control it. What I mean by this is the following - there is a button inside tram & a button outside tram on each stop point which will force tram to drive to the other side (this will only work if tram's current state is inactive mode: not driving to the other side & not rotating in stop point).
This requires a lot of testing mainly since tram has fairly long travel distance and it could cause issues (so far I didn't notice any).
Will review this instance later since I see there are more issues which cause last boss not to appear. Until then, players will no longer need to summon https://classic.db.pandawow.me?npc=11502/ragnaros (I gave him a fixed spawn location).
Fix will be applied tomorrow after restart.