[solved] Missing Shelly H&T entity

Configuration
1

Hi,
today I integrated 3 identical Shelly BLU H&T temperature sensors. All are working fine, but:
2 devices have 6 entities, one only 5 enttities. The missing one is the button.
It’s no real problem, because I don´t use it, but I want to understand what and why it happens.
Any ideas?
Br, Michael

2

I found the solution. After pressing the button and restarting the Gateway the entity was added to HA.