- Thank via mobile an edit done in a page you are watching. You get a confirmation message.
- Go to desktop, and check Special:Log/thanks to confirm that your thanks are there.
- Now go to your Watchlist.
The edit you have thanks appears as thanked.
That edit still appears as "thankable", as if you wouldn't have thanked it before. Thanks given via mobile aren't registered in your watchlist. You will only find the thanks given via desktop.