Quick answer: Construct 3 effect parameter cross-fades stuttering on pause/resume? Default behavior reads delta time; pause stops it - use unscaled time.
UI fade-in tween stutters when pause toggled mid-tween.
Use unscaled time
Tween mode = real time. Pause-immune.
Or pause cross-fades on pause
Cross-fades freeze; resume restarts. Different UX.
Audit per cross-fade
Each cross-fade's pause behavior documented.
“Pause behavior is per-system. Cross-fades need to choose.”
If your UI cross-fades stutter, the time-source audit is the answer.