I've had a number of Arrhythmia events, tend to be at night and wake me up, often after having eaten maybe too much... indigestion. Heart beats go all over the place. Sometimes burping to release wind can help. Had it investigated a couple of times, without solid results, part of my heart is enlarged, heart will often miss a beat. It's really not great when they happen but fortunately, for me, they have been few far between.
They've not been linked to my T2ness as far as I am aware.
Wish you well.