Please check if your PhotoShow has been accidentally set to "Mini" mode in its popup window and if that doesn't help much, you might wanna send me the website on which PhotoShow doesn't work properly, so that I can give it a check. Thanks.

Edit: Thanks for the additional info. PhotoShow does have some problems with some of the images on Reddit. I'm gonna try to fix them with future updates.

As far as I test it, it works well with Twitter. It would be appreciated if you could list the link of the page on which PhotoShow doesn't work appropriately, so that I could check and fix any potential problem. Thank you.