Walking Pace inaccurate

Epix gen 2 software 17.23

out walking today & usual pace is ~15:20, today it tells me 18:50.

I had a positive covid test yesterday so had thought I was impaired and slowed down a bit once I saw on my epix that the pace was far lower than normal

i stopped a few times and spoke to some people etc and 1st mile was completed in 16 mins while the pace still showed 18:50.

it was a 3 mile walk and the other 2 miles showed upwards of 20 minutes per mile?

Total walk was 51 mins which is far less than the minimum pace epix showed me. 

This worked fine last Saturday before the upgrade to 17.23.

is there a fix for this?