Why delay parameters do not propagate to other clips?

Spook

My steps were as following:

• Created a clip with custom synth, then saved this synth as a preset
• Cloned the clip to the second one and changed the notes
• Cloned the clip to the third one and changed the notes
• Changed the delay parameters for the synth in the first clip (using pads, not knobs)
• The delay did not propagate to the second clip (as I understand, this is by design)
• So I saved the preset (overwritten the original one) - the delay did not propagate
• So I've opened the two clips and manually loaded the preset - the delay did not change
• So I've created a new synth preset (Shift + Synth) and then loaded the preset - the delay did not change
• So I've changed the oscillator types in the first patch, saved the preset - after that the oscillators changed in the two other presets, but delay stayed as it was (different than in the first patch)

Why doesn't the delay change even when I overwrite the preset and then load it in a different clip? Is delay setting per-clip, not per-preset?