Problem adding a border after cropping

[pmcabinet]

I open an image in Affinity Photo 2 and make an unconstrained crop. Then I add a vignette (new live filter layer>colours>vignette).

Now when I try to add an effect (layer effects>outline>inside) I get the 'border' on only two sides - the sides that were unchanged when I cropped the image.

I have tried rasterising the cropped layer to get rid of the 'saved' portion of the original image, but that doesn't make any difference. If I go back to the uncropped original then I get the full border outline.

Clearly my process is not correct - what should I be doing instead?

[v_kyr]

After doing the crop + vignette try "merge visable", afterwards then perform the inner outline bordering on the merged layer.

[walt.farrell]

Have you tried Rasterize & Trim, or did you only Rasterize?

[thomaso]

Alternatively you can use a separate object for the border, e.g. a rectangle with a stroke applied.

This also enables you to export a wanted detail entirely without cropping or rasterizing the initial image by using the export option "Selection Area". (… and, if you don't want a coloured border, even regardless of its position in the layers hierarchy).