Occasional short pulse interval.

I bought a new Dr Morepen pulse oximeter and it displayed a message " Suspected occasional short pulse interval while I checked my heart rate and oxygen. Is it something to worry about. I had Covid last year ( mild infection, wasn't even hospitalized) and I had occasional palpitations after that which improved with time. Last year after recovering from Covid infection I got my holter monitor also done on which everything else was normal except Sinus Arrhythmia, doctor advised it is a normal finding. I got my Echo test done in October this year which was normal. I keep on checking my pulse rate and oxygen as I have palpitations sometimes in between after my Covid infection last year. Please advise if I need to get further tests done for this finding of " suspected occasional short pulse interval" on pulse oximeter.