Rotate and scale filters scale parameters using advanced key frames not getting saved to preset

[sauron]

Created an animation with the Rotate and Scale filter’s scale parameter using advanced key frames. The intent is to scale from 100% to 50% and back to 100% in 2 seconds. Saved it as a preset. When I apply the preset it does nothing.

The scale parameters using advanced key frames do not get saved to a preset. Using simple key frames I saved the animation as a preset successfully.

All other parameters using advanced key frames, such as rotation and X & Y offset can be saved as preset.

[shotcut]

For me, it saves but upon choosing it, only one dimension of scaling takes place - along the X axis. This is fixed for the next release v18.10.