That was the result of one study by a reputable medical unit and to ignore the conclusions and describing them as a "bit iffy" is irresponsible.
That is what they have studied and that is what they have found.
It is lightweight at the moment, but there will be other studies following this and if the results are replicated, then it is a serious piece of research with practical and serious repercussions.
If it is not replicated in further studies.........then forget it.
If you are a woman taking the drug then you are fine, if you are male, then watch this space.
What would i do if I was taking a PPI? I would continue taking it.