Image block vertically stretched

[bobbingwide]

In these screen captures the image block is being vertically stretched.
The featured image is OK.
Explain.

[bobbingwide]

This appears to be the same problem as bobbingwide/thisis#13
Easy to test, apply the same fix.

/**
Add CSS to prevent large and full sized images from losing their aspect ratio 
 */
 .wp-block-image img {
	height: auto;
}

[bobbingwide]

I get a similar problem with the image in a media & text block. The generated CSS is...

.wp-block-media-text__media img, .wp-block-media-text__media video {
    max-width: unset;
    width: 100%;
    vertical-align: middle;
}

Adding height: auto; to the style corrects this behaviour as well.