Is there a bug in this code impacting thumbnail?

Hello,
The formatting of the thumbnail on the left is off. It should look the thumbnail on the right. See here.
https://screencast.com/t/M2it2aIG67

Can you tell if there is something in the code below that is causing that thumbnail to not display correctly? Thanks a lot

<div class=”elementor-post__thumbnail elementor-fit-height”><img width=”300″ height=”200″ src=”<?php echo get_the_post_thumbnail_url(); ?>” class=”attachment-medium size-medium” alt=”” srcset=”<?php echo get_the_post_thumbnail_url(); ?> 300w, <?php echo get_the_post_thumbnail_url(); ?> 1024w, <?php echo get_the_post_thumbnail_url(); ?> 768w, <?php echo get_the_post_thumbnail_url(); ?> 1536w, <?php echo get_the_post_thumbnail_url(); ?>1920w” sizes=”(max-width: 300px) 100vw, 300px”></div>

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