To save Carla lv2 state in Ardour

Is this an Ardour’s bug?
I try to make the rack set in Carla lv2 plugin. It works great, even I can do some automation. But Ardour doesn’t save the state of Carla. That’s why I need to save Carla’s presets every time and reload manually for each track I use.

More detail illustration I wrote here:

Yesterday I tried to use Carla-rack LXVST instead of Carla-rack LV2. Ardour saves the state, but loads after restarting through time: Some time carla sets every plugins, some times - looses few of them.

Think, I use the latest nightly builds of ardour, therefore were problems… partially.