It's still bugger on main browsers, I've tested Chrome Version 88.0.4324.150 Edge Version 88.0.705.63. They do the left shift. But the Inkitt writing app works.
So, unfortunately, what needs to be done is save the cover to a personal google drive or other folder able to access via mobile. Download the cover then upload it to the book via Inkitt Writing.
I think why it doesn't work on the browser is because the cover app seems to use scaling.
It's still bugger on main browsers, I've tested Chrome Version 88.0.4324.150 Edge Version 88.0.705.63. They do the left shift. But the Inkitt writing app works.
So, unfortunately, what needs to be done is save the cover to a personal google drive or other folder able to access via mobile. Download the cover then upload it to the book via Inkitt Writing.
I think why it doesn't work on the browser is because the cover app seems to use scaling.