the much more common symptom is loss of smell, characterized as "loss of taste" by laymen(/women/children). The very study you link to says so (https://pubmed.ncbi.nlm.nih.gov/37265267/)
Either Sysco is engaged in a conspiracy to poison us all with sugar packets for no apparent benefit. Or the much more logical conclusion that a person put a pack of sugar into their tea, it didn't sweeten it as much as they thought it should, they then convinced themself it wasn't sugar at all and when tasting it their belief that it wouldn't be sweet biased their observation.