When I try to use an image that has an alpha channel, the image has glowing around the parts where there is transparency. Below are images to better explain my issue. Both are using the same image with exactly the same node setup and Cycles render engine.
In Blender 2.90.1 it looks like this:
and in Blender 2.79 it works as expected:
This is the image i'm using. It is a TIF file created in Photoshop
Is this a bug or has something changed in the way alpha is handled? I haven't used 2.90.1 version for long as I only recently updated from 2.79
EDIT: After packing the TIFF file into the blend file, the glowing disappeared. Then after unpacking the image and adding it to a new image texture node, the glowing appeared again.