Hi there,
I originally raised this bug on Gutenberg as it started happening when my editor switched over. However, after some discussion they have indicated it might be the theme I am using.
When I post two images next to each other, and both are left aligned, they do not line up at the top (the second one drops slightly).
You can see the full discussion here:
https://github.com/WordPress/gutenberg/issues/13175
They have suggested that it is a CSS selector.
Would you be able to look at this and tell me if this is indeed a theme issue?
Thank you 🙂