Concerning the REP issue: If you want to play the high heat races while not losing your rep just set Heat to level 50 rather than 5 so by the time you're back to the Garage you'll be forced back up to Rep level 50 by the huge amount of points earned.
If you're REP level 1 by the return to the garage return to lobby then do solo play again and the level will be reset to 50.
P.S: All of this in offline mode, ofc.
Returning to the lobby don’t work at least for my I close the ga and re-open again and that do the work for me as soon I go into the garage again I got all my ran and rep back
Trainer is mighty fine, just don't use the heat reset option. It will f*ck up your game with no way to recover. Just saying... If you disagree, post here how to use it, because I found no way to use it properly, thankfully I have backups.
the option was ORIGINALLY to set the heat to 0 so you don't have police pursuit and the chase ends, etc.
People wanted it higher to be able to 'level up faster' and make the heat something else, so it's up to them to set the value. If they use large number like 50 and then it triggers XP, then yes it may level you up so quick that things that unlock (at level 12 or something) are bypassed and you are simply level 50.
THIS IS A TRAINER THAT IS DOING THINGS TO THE GAME THAT THE DEVELOPERS NEVER INTENDED NOR DID THEY FORSEE AND CODE TO AVOID IT.
My suggestion is to put the heat at a number that makes the heat level 4 or 5 and then use that and level up that way. If you are supposed to unlock car x at level 6 and you have heat at 25 or something and you level up past 6 instantly, then YES you might not unlock the car at level 6.
Go offline, delete your save, and start over or start a new game or something.
I have no suggestions. The trainer is working as intended and as described and as people suggested. Any consequences to you cheating like you want and getting XP more rapidly than you are supposed to is unforseable and I cannot undo it nor see into the future or have any possible way of knowing what you did or didn't unlock by cheating.
best,
Cal