The widescreen media query used in the node.module.css for widescreens catches mobile Android when the keyboard drawer is open.
This was with my Pixel 3 device. I don't have another device around to test, yet.
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I have no idea how to best word this. When the keyboard opens to add body text or title, the viewpoint must change and the form sidebar comes up and the entity form isn't usable.
Here are a video and screenshot.

😱 It's not Claro, it's node.module.css.
/* Wide screens */
@media
screen and (min-width: 780px),
(orientation: landscape) and (min-device-height: 780px) {
This media query catches the open keyboard drawer.
