Snapcraft not building all requested architectures

Hi,

I have a snap (tingdahl-observatory-http-cli-scanner) that does not build on power PC. That’s not a primary target architecture for the snap, so I went on and specified the architectures that should be built using the shorthand format (following example 4 at https://snapcraft.io/docs/architectures)

architectures:
  - amd64
  - arm64
  - armhf
  - s390x

The result is however that only the amd64 is built. Is that a bug, or have I done something wrong?

I have reverted and removed the architecture part of my yaml so if you look now, all architectures are building.

Thanks,

Kristofer