Templates in automations and scripts

[surfingbytes]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

The "Improved UI experience when using templates in automations & scripts" added in 2025.5 does work for some actions, but not for all. I'm not sure if the UI for this case is defined in specific integration (ChimeTTS), or whether HA builds it dynamically (which is what I'd expect):

Feel free to close this if the GUI is actually build by the integration and not by HA Frontend.

Describe the behavior you expected

I'd be able to edit this action in GUI.

Steps to reproduce the issue

• Add ChimeTTS integration
• Call chime_tts.say
• Update it to use templates

What version of Home Assistant Core has the issue?

core-2025.5.3

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue?

Firefox 138.0.4

Which operating system are you using to run this browser?

Win 11

State of relevant entities

Problem-relevant frontend configuration

Javascript errors shown in your browser console/inspector

Additional information

No response

[karwosts]

At least for now it's not supported for the target field, only for data fields. That one behaves a little differently and wasn't included in the recent updates.