not zooming some thumbnails on pages where the image URLs have query strings

[robohack]

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Description of the problem

hoverzoom has stopped zooming images for thumbnails on one of the webcam sites I frequently use

Prior to some recent OS or browser update these all worked fine.

See also the "mountain" tab on the same page where only one (of those working) thumbnail fails to load (the "Silver Star Mountain - The Bulldog" thumbnail fails to zoom).

The problem appears to be related to image urls with query strings, such as:

https://www.castanet.net/scenic-web-cams/assets/cameras/scenic4/now.jpg?201807171010

I have no idea though if this is the root cause or not.

Url of the page where the problem occurs (not the image url)

https://www.castanet.net/scenic-web-cams/ (only one thumbnail zooms) https://www.castanet.net/ski-hill-cams/ (all but one thumbnail zooms)

Steps to reproduce the problem (include image url here)

1. try hovering on each of the camera thumbnails
2. note that only the last (right-most) one zooms

Example image URL that fails to zoom:

https://www.castanet.net/scenic-web-cams/assets/cameras/scenic11/now.jpg?201807171003

OS version, extension version (Chrome only, Firefox is not supported)

macOS 10.13.6 Google Chrome 68.0.3440.84  (Official Build) (64-bit) hoverzoom 1.0.132