Help! No GPS Map on App after running

I bought an Instinct Solar.

GPS map shows up on walks.

But on my runs, the map does not show up on the phone app. I know for sure the GPS is on.

I've tried resetting the watch.

Not sure what else to do.

I do not leave the watch connected to the phone, I connect it once a day to download the days activities.

Any advice?

Thanks!