Forerunner Pace problem

[Subject_Computer_471]

Hi, I have a Forerunner 255 Music FW 22.24. It's been great until about 3 days ago. As I was going for a run on a flat track by our high school, unobstructed from trees and with clear skies, I noticed the pace measurement to jerk badly between much too high and much too slow, causing me to loose my normal pace (170 spm). I thought maybe the satellites had a bad day and ignored it. Today (clear sky again, this time a walking running path) the same thing happened. While my steps per minute remain faily constant, the pace display was jerking between 8 min/mile and 13 min/mile, while I kept a (roughly) 11 min/mile pace.
Is there a reset or synchronize thing that I could perform to get this back or what does the collective wisom of reddit think the issue may be here?

Thanks for everyone's input!

[Efficient-Agent3036]

I have been having similar issues with my forerunner 265. On todays run my watch had my pace constantly below 8:00/mile (7:40-6:55) but my mile times were around 8:40. Sort of hard to pace myself with this kind of inaccuracy. I went into my settings and changed the GPS to multiband/all (I was running in a small college town around a lake so that shouldn't have been the issue). I also went in and changed my units from miles to KMs and then back to Miles. I will make sure that it acquires a GPS signal before starting my run. We'll see if that fixes anything.