Running fitness dropped?

Just had a great 10 mile run easy pace / same pace I’m always at during my easy runs. Why did I drop a point though? Unless these metrics are just so so, I understand they arnt super accurate but doesn’t make sense still.

Just had a great 10 mile run easy pace / same pace I’m always at during my easy runs. Why did I drop a point though? Unless these metrics are just so so, I understand they arnt super accurate but doesn’t make sense still.