When Bjerg complained about it in the play-offs a few patches earlier? They never showed his player cam, they never offered any actual proof (and in fact, all the other views at the time they did show implied Aurelion's particles were working as they should), they just took his word for it and gave TSM what was functionally a free fourth ban for the rest of the series.
This was a while ago so please correct me if I'm wrong. From what I remember, they spent a good half hour or so on stage that day during the pause just to see if this was a one time thing or if there was some sort of pattern to it. They may not have shown footage of the bug, but there was clearly enough evidence to warrant a remake. During the time that they were testing this, they determined that it was a specific sequence of inputs (something like toggle camera x times while going in and out of brush or something else like that) from the aurelion sol player. It was such an odd pattern that it was likely intentional, but not completely impossible to pull off accidentally so they gave huhi the benefit of the doubt.
...gave TSM what was functionally a free fourth ban for the rest of the series
Now this is something that I remember very clearly. Everyone seems to forget that even though it felt like CLG had momentum, the gold was in favor of TSM... so while it would be natural to say that TSM got a free 4th ban, it would seem as though you could just as easily make the claim that CLG was going to lose the game anyway making an aurelion sol pick unlikely in the following game which essentially throws out the free fourth ban idea. Basically what we can conclude is that the game wasnt long enough to support one claim over the other so it would be trivial to say that they got a free 4th ban or that CLG was going to lose anyway.
What we do know is that TSM was 2-0 against CLG that split and that TSM swept them convincingly once Aurelion Sol was removed. If Sol had not been removed and CLG somehow managed a comeback that game, we would be left wondering how CLG could possibly win the next game because TSM would obviously have swapped one of the other bans for Sol (for a total of 3 bans)...and the answer quite frankly is that they couldnt.
The preferential treatment you speak of seems to be based in a hopeful/"best case scenario" hypothetical situation. Realistically speaking there was a bug that either resulted in a death or was repeatable and therefore according to the rules the game must be remade or the champion disabled until fixed. Unfortunately for Aurelion Sol it happened to be both. This isn't a TSM only policy as we saw the same thing happen to graggas the year before at worlds when a different team encountered a bug with the champ. That instance had a much bigger impact because he was a very common jg at the time where as Sol has still seen very little play nearly a year later.
