Very interesting. I can also get Afib after many years of high intensity exercise

This happens to me occasionally, but it's typically stimulant and blood sugar related.

There are some indications that it might be related to ion availability in your body, so copper, zinc, and calcium specifically. You may also consider that HF RF found in phones, wifi, and Bluetooth can do not great things to the calcium channels in cell walls (it essentially locks the channels open in some cases).

There are a lot of factors to this, but these are things I've picked up in my reading for my own issues.