Like the title says, the Save button on the Motion Detection page looks like it's grayed out but actually it is not, so it can be confusing:

Another problem with the Tapo app is that it doesn't use a consistent "design language". For example, on other pages the Save button looks like this:

Other pages don't even have a Save button at all. Basically the Tapo user interface loosks pretty but is plagued by inconsistencies. This could be improved. Thanks!