Photon image resize errors: Sorry, the parameters you provided were not valid

Hi I have an updated WP with Jetpack + Photon.

Some images load up, but some return this error:
Sorry, the parameters you provided were not valid

OK:
https://i0.wp.com/www.hungrycactus.com/wp-content/uploads/totorohouse-8-of-18.jpg?resize=768%2C1014

NOT OK:
https://i0.wp.com/www.hungrycactus.com/wp-content/uploads/totorohouse-9-of-18.jpg?resize=768%2C1014

I have no idea why….the raw HTML post is below:

<a href="https://www.hungrycactus.com/wp-content/uploads/totorohouse-8-of-18.jpg" rel="attachment wp-att-4108">
<img class="aligncenter size-large wp-image-4108" src="https://www.hungrycactus.com/wp-content/uploads/totorohouse-8-of-18-776x1024.jpg" alt="totorohouse (8 of 18)" width="474" height="625" />
</a> 

<a href="https://www.hungrycactus.com/wp-content/uploads/totorohouse-9-of-18.jpg" rel="attachment wp-att-4109">
<img class="aligncenter size-large wp-image-4109" src="https://www.hungrycactus.com/wp-content/uploads/totorohouse-9-of-18-776x1024.jpg" alt="totorohouse (9 of 18)" width="474" height="625" />
</a>