Helper: Cover Template (GUI) - Actions for open/close/stop with a switch (garage door) doesnt work

[Tom-325d]

The problem

Hello,

Actions using a switch in the GUI cover template via the new Helpers don't work when I try to control the virtual garage door via the control panel (up/down arrows). I want to trigger my switching output to the garage door opener (Homematic IP Wired switching actuator) in the actions, but I keep getting an error. If I trigger the action manually, it works.

The template expects a "cover." domain in the action. I've tested it. For example, if I add a physical roller shutter, which is natively available as a cover domain entity, to the open action, the template works.

But the template is specifically designed for this purpose: to create native garage door logic as a cover domain, combined with binary sensors and a simple (switch.) switching output to the door opener.

In my case, the garage door opener's push-button input (from the actuator's switching output) needs to be switched on for 300ms and then immediately off again for the door to start moving. In other words, a short pulse is sufficient. I could implement this directly using the new GUI actions in the template. I've already wrapped the three action steps in a small script using YAML.

I still have to take the roundabout way and create all the logic using YAML for everything to work as intended.

What version of Home Assistant Core has the issue?

2025.12.3

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

No response

Link to integration documentation on our website

No response

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

Additional information

No response