This is a question for an electrophysiologist or maybe a cardiologist. It will depend on what those other rhythms are, but as someone that has had AFIB and lots of wonky bets before my catheter ablation (so far successful), I would think that 0.08 is a low load and not really too much to worry about unless you are having symptoms. If you feel something that you don’t like, or you continue to be anxious about those “other” numbers talk to a physician. I push my 62 yr old heart pretty good training to race bicycles, and I see about that same amount of “other.” Most if it appears to be just the strap moving, but every now and then, when I get up near my max HR, I get an occasional PAC (Premature Atrial Contraction). My electrophysiologist says it is absolutely nothing to worry about and very common. But he has looked at mine, not yours.

I find the ‘%other’ a particularly useless statistic for anything other than very long term ‘directional’ information. It is not the same as the % of your heart beats that are ‘ectopic’ . In fact the range of numbers of ectopic beats that can give the same ‘%other’ is huge (I worked the maths through on a one hour recording of my own, with an average heart rate of 90 – and it turns out that there was a factor of 30 between the lowest and highest total number of ectopic beats, during that recording , which could have given the same ‘%other’ value.
So I agree completely with Terry – if you are worried then get a cardiologist to look at the traces – or join the Fourth Frontier ‘coaching’ programme. I use this and have a weekly discussion with one of the ‘cardiac coaches’ who helps interpret my recordings and highlight any that ought to be sent to my doctor / cardiologist for further review. This gives me real peace of mind (I was diagnosed with AFib 4 years ago and had a stroke on Christmas day 2021 – so was very nervous about getting back into an exercise regime)