problem with intensity minutes

Hello. A few days ago, I switched my watch (I had the Fenix 5, now I bought the Enduro 3). The first workout with the new watch (16 km) was recorded correctly, but the "intensity minutes" showed only 7 minutes. The next two hour-long workouts were saved normally, but the "intensity minutes" showed 0. I didn’t have this issue with the previous watch model. Heart rate zones and watch settings are in order. The only thing I changed in the watch settings was my weight (in the user profile). I have restarted the watch several times. Please help me solve this problem!