S9 not using HR sensor

[TheGuyFromTheSummit]

Recently my S9 stopped pairing with the heart rate belt (smart sensor).
So I replaced the battery and reconnected it (worked fine).

But yet my S9 still won’t connect with the hr sensor when I start a new activity. (Despite having HR Belt menu “on”).

So far I tried a soft reset and didn’t help. Repairing didn’t solve the problem.

Does anyone has a solution for this problem?

Thanks!

Ps. The search function didn’t help.

[Mff73]

@theguyfromthesummit
Could you sensor be paired with another device at the same time and connected with this other one?

[TheGuyFromTheSummit]

@mff73
I only use it with this one watch (no phone etc)
And repairing works within a second.

Just not in a sports mode.

[TheGuyFromTheSummit]

So after leaving the watch and smart sensor in the corner for a couple of hours it works.

Thanks for your help!