I'd really love to find the study again if anyone else knows where it is (my googling is apparently not good enough)
I give it higher odds that the study's results were based on bad statistics, or an insufficient sample size, than that there's an actual notable difference here.
The reproducibility crisis has made this, I think, a reasonable default assumption for old studies of this sort.
Seeing as how it is made directly from the sucrose, I'm not sure how you can say it is "completely unrelated". It is identical to sucrose except for the substitution of three chlorine atoms for hydroxyl groups.
Have you seen an allergist about your reaction? They should be able to do a skin test to confirm the allergy, and I'm sure they would be quite interested, as there seem to be no reports in the medical literature of sucralose allergies.
Many are re-formulating to alcohol-free formulas, and I think it’s because they fear tobacco-style lawsuits from anyone that gets oral/throat cancers.
It strikes me that this cannot really be a good sign for society in general when the degeneration is breaking through even the measures to inhibit degenerative detrimental behaviors. It also appears we are accumulating such conditions at an alarming rate all across the western world in particular, emanating and spreading out from a few specific points.
https://pubmed.ncbi.nlm.nih.gov/35081826/
At Bristle (oral microbiome testing) we advocate against broad antimicrobial mouthrinses as they can negatively impact your oral health similar to how antibiotics cause dysbiosis in the gut.
Or the alcohol / other chemicals.