No cadence after 19.20 SOLVED

I updated to 19.20 this morning, just did the suggested recovery run and there is no cadence data. I did the suggested base run yesterday (with fw 19.10) and all the watch provided (ie I don't have a HRM or Stryd or similar, just the watch) cadence data was there. Both runs were similar in terms of arm movement or whatever - on both runs I probably checked the watch more often than I normally would because I was trying to stay in the suggested "zone" of the workout. But if arm movement was the issue, it would have been so on both runs.

It's not a measurement I care about especially (although I would be disappointed to lose it permanently) but I am posting this to see if it's a common issue with the update.

I have the base Fenix 6.

Edit: The suggested restart and adding a cadence field to run fixed this.