Hi Guys
I just saw this thread and thought it might be useful to mention the following:
If your images are sRGB you should really be able to leave them untagged as I believe all browsers assume un-tagged images to be sRGB.
This 500px blog post explains in more detail:
https://iso.500px.com/500px-color-profiles-file-formats-and-you/
Maybe simply stripping the profile from the hi-res uploads is a simple solution?
Best
Joe