App crash upon redoing colour conversion from file history

[AcrobaticMelon]

Affinity Photo for iPad crashes when re-applying a specific colour conversion from a file's history pane.

Reproduction steps:

1. Download the "Elegance" portrait retouching sample from the Affinity Photo workbook
2. Open the .afphoto file in Affinity Photo for iPad
3. Show the history pane (the last item is the suspect colour conversion)
4. Redo the actions to the end of the timeline including the colour conversion
5. The app crashes

I've verified that this issue occurs on versions 1.10.5.280 and 2.0.1.307 when working on iPadOS 15.7.1, but I haven't checked against a desktop version.

[Chris B]

Thanks. I've reproduced this and will log it with the developers.