Zwave JS: the transition parameter used within light.turn_on / light.turn_off seem to be ignored

[wauswaus]

The problem

I just switched from OZW 1.6 to Zwave JS and have a Fibaro FGD212 dimmer. In an automation I slowly dim the light to off using the light.turn_off service with the transition parameter set 10 seconds. This worked flawlessly in OZW but in Zwave JS it seems that this parameter is ignored. The light is switched off immediately in stead of going to off in the requested 10s. I also tested this in the Developer tools - services page. Also tried for the turn_on service and there the transition parameter also doesn't seem to do anything and the light is immediately switched to the requested brightness.

What is version of Home Assistant Core has the issue?

2021.3.4

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

Zwave JS

Link to integration documentation on our website

https://www.home-assistant.io/integrations/zwave_js

Example YAML snippet

Tried the service calls from the developer - services page:
service: light.turn_off
data:
  transition: 10
target:
  entity_id: light.toilet_down_dimmer_fibaro

Anything in the logs that might be useful for us?

nothing

[probot-home-assistant]

Hey there @home-assistant/z-wave, mind taking a look at this issue as its been labeled with an integration (zwave_js) you are listed as a codeowner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[FuzzyMistborn]

This issue needs to be resolved before transitions will work with zwavejs: zwave-js/node-zwave-js#1321

[wauswaus]

ah yes, thanks! Then I'll close this issue.