Images being stretched using Gallery or Image block

Site URL: http://www.amandabrandimore.ca

Hello

this started a few months ago. I haven't changed the way I take photos at all this year and for some reason, images are being stretched. About 80% of the look like this.

I have to use a crappy gallery to sort of smoosh them together so this doesn't happen.  I tried adding a spacer block and sizing the images smaller and no go. It still looks terrible

Below is a screenshot of one looking good and another looking stretched.

What is going on and how can this be fixed??

Note, they look fine in Edit mode.

Okay so I have narrowed down the source of the issue. 

It's with "Inline" photos.

If I change them to Stack design for example, they appear fine.