Extreme shaking of Form Editor view when playing timeline

Observed behaviour:

Extreme shaking is observed on the screen when playing a timeline in the Form View.

(see attached video)

Expected:

No shaking, smooth animation. (which is what I have observed before)

Project is also attached:

Steps to reproduce:

1. Go to Projects
2. Open Cluster Art -> assets -> ClusterArt.ui.qml
3. Go down to timeline.
4. Click the green play arrow.
5. animation will jump all over and leave artifacts on the screen after playing.

The green run button in the lower left corner will show a correct looking animation when it runs the QML.