Google Search mobile app is making text bounce around as I scroll

Site URL: https://www.oldsonmedical.com/

A client pointed out that as she scrolls her site on mobile the text is resizing and bumping around. I had to see to beleive and its very odd! I asked what browser she's using and she said Google. At first I assumed it was Chrome, which I have, but then realzied Google has a separate app just called Google (w/ G as the icon) that's just for search. I checked a few other SS sites and this app is resizing H2-H4 text on alll squarespace sites as you scroll....seems like a bug but has anyone else had this happen to them??