MRI disabled every iOS device in facility

Wasn't there followup that this wasn't actually the helium, but lack of proper shielding for some of the EM radiation? I believe it also turned out that there were other dead devices too, they just happened to see a lot of i-devices first.

(A brief skim through the thread and I didn't see a note outside of a few people thinking "it's really probably EM", but I recall my wife mentioning this earlier in the week and being deflated at the mundane outcome)