You are using a multirow taskbar, right? I cannot reproduce the issue.

Does the issue occur only when the tweaker is running? Does it occur when all of the options are off?

Perhaps you can track the option which causes the issue?

The Windows 10 Anniversary Update is supported by 7+ Taskbar Tweaker v5.2.

The Windows 10 Anniversary Update is supported by 7+ Taskbar Tweaker v5.2.

Implemented in 7+ Taskbar Tweaker v5.2.

Implemented in 7+ Taskbar Tweaker v5.2.

Fixed in 7+ Taskbar Tweaker v5.2.

Closing as a duplicate of:

http://tweaker.userecho.com/topics/420-suggestion-need-delay-before-showing-preview-on-hover/

Hi,

It's not related to disabling taskbar always on top, is it?

In any case, it might be because you're using Windows 10 Anniversary Update, which is not supported at this time.

See also:

http://tweaker.userecho.com/topics/599-doesnt-work-on-windows-10-1607-build-082016-anniversary-update/

OK, good to know that you have found a solution. It probably won't be added to 7+ Taskbar Tweaker, but I'll leave the suggestion open so that other users could leave feedback.

It seems like the option is still there in the new build.

Perhaps you were referring to something else?