Horizontal scroll on mobile devices when picture tag is enabled

Hello. I have noticed that when I enable “Use <picture> Element (experimental)“ in the settings, the width of the site container is doubled and horizontal scrolling appears on mobile devices in the articles where this tag is inserted. I think it should not be so. I am inserting images using Gutenberg with lightbox enabled. Here is the code that is inserted with the plugin enabled:

https://pastebin.com/7PYwhUkv

And here without it:

https://pastebin.com/Y4xjr591