No HR from HRM-Swim after upgrade to 7.00

Had a pool swim on saturday, using my Fenix5 with 6.0 SW - HR is recorded.
Upgraded sw on sunday, had a new pool swim yesterday with 7.0 SW - no HR.
The Fenix found the HRM-Swim belt before i jumped in the water.

Running with HRM-Tri after the swim worked great.

Anyone else having this issue?