apple watch fitness is not tracking steps/distance accurately

The last 2 days, my distance/steps has been less, but I walk the same daily routine/routes. Example:

Saturday 4/20 - 11,571 steps/5.83MI. Today 4/24 - 14,154 steps/5.84MI. Something changed, was there an update? I have been on a good track for the year and am missing data to track my progress. Anyone else having this issue recently? Any solutions?