I had a notification, just now that I had used over 800MB of data, today. I checked and it was mostly Chrome, more to the point,ostly in one go, this evening.
Now, at the start of this hour, I very briefly clicked on a couple of mn threads, before putting my phone down and resuming my knitting.
I'm wondering if the same issues causing glitching might be eating data because it's a lot and I'm lucky that a new billing month starts tomorrow.