Had my FR165m since Oct 2024. Currently on sw22.22.
Have noticed that routinely my recorder he suddenly jumps by 10-15% after 20 mins or so. First time this happened was on the 23rd Jan and send to have happened every run since then (not sure what sw I was on then but am on the beta program) couple of screenshots of pace and HR - today's seems to have duplicates the issue at the start of the run then again mid run after walking for a short time.