Keyframebuttons in the Inspector are not always correctly colored

[linusha]

Describe the bug
After moving a keyframe, the button does not always get colored when scrolling to it.

To Reproduce

1. Move a keyframe
2. Go to that Scrollposition (does not matter in which way)
3. See that the button is not colored.
4. Clicking some Keyframes and then returning will have the button colored correctly.

Expected behavior
Button is always colored when a keyframe on the currently selected Morph exists at the current scroll position.

[Paula-Kli]

I cannot reproduce this