MK1 for cycling with heart rate reset problem when cadence sensor reconnect

Not sure if this is the problem only on me.

I am using this new MK1 for diving together with multiple sports, which is great and I loving it much.

But there is an issue happening recently and I am not sure if this happen after I upgraded to firmware 2.50.0.0.

I found when I am cycling, say during a 2 hour ride yesterday, my cadence sensor disconnected and reconnected to MK1 for 2 times.
This is not a main issue, as this just taken a second for cadence reconnection.
However, whenever this scenario happening, the heart rate counter would reset and taken around 3-5 minutes to pick up a correct value.

For an example, my heart rate was 150 during cycling, it dropped to 0 heart rate, then starting from 60 to 70 ...until 150 which is the normal reading.
This progress taking 3-5 min.
And I broadcast the heart rate during activity to my Garmin 510.
When this reset of heart rate issue happened, the connection of hear rate to Garmin 510 would never resume.
I need to stop the broadcast and start it again manually to establish the connection again.

I tried to pair the cadence sensor again and replace its battery, but not helpful.
Any idea or this is a bug on current version?