REST API / push button POST not working on helper button

Hello all
Ive created a helper button called “input_button.camera_saloon_movement
I am able to do GET on it and receive the last activation time:

-H “Authorization: Bearer ”
-H “Content-Type: application/json”

But im unable to do “click” on it with POST, although i get response code 200:

curl -v -X POST
-H “Authorization: Bearer ”
-H “Content-Type: application/json”
-d ‘{“entity_id”: “input_button.camera_saloon_movement”}’

I check in both UI and with REST API and button last trigger time does not update

from UI I can click on the helper button and of course it updates the last trigger time

any idea why?

Also note for state type helpers I’m able todo GET/POST w/o problems.