Morph Cut skipping frame, outputting artefact instead
Hey there,
I've been applying morph cuts in side a nested sequence. Most of them work fine, but there are 2 of them a relatively short time after another. There's always a "gap" in between them that looks like that:

There's a vignette on a background layer, so that's correct, bit there's no such edge or vertical line, just a person.
I've tried reapplying the morph cut, alzering it length, but it just outputs the artefact in the altered length.
Latest version of PP, Win 10, 128 GB RAM, Quadro M5000, Dual Xeons, M2 SSDs only
N.b.: there are no gaps or problems in the preview. This only occurs after output via Media Encoder - exporting directly, it doesn't happen!
