Warnings on error log

I’m getting this warnings on my error logs:

Warning: Trying to access array offset on value of type null in /wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/utils/class-amp-image-dimension-extractor.php on line 247

Warning: Undefined variable $height in /wp-content/plugins/accelerated-mobile-pages/includes/vendor/amp/includes/utils/class-amp-image-dimension-extractor.php on line 247

I believe that it happens when image size has a height of zero (to be calculated automatically having the width)

Any idea?