I came across a weird issue.
I have setup the icon as stated in the docs with this icon:

In my dock it shows fine:

But the problem is this:

Anyone has an idea where to look at?
Did you follow the icon guide? Check out the example as well and see if that works for you.
I encountered this as well and solved it by making sure the icons are in the build/ folder and not in build/icons which is where electron-icon-builder normally saves the generated icons.
@fridzema can you try @alfonzm and my suggestions and see if they fix the issue?
@alfonzm that seems to do the trick, thanks!
@nklayman Thanks for your support!
Most helpful comment
I encountered this as well and solved it by making sure the icons are in the
build/folder and not inbuild/iconswhich is whereelectron-icon-buildernormally saves the generated icons.See https://www.electron.build/icons