Qt Widget Designer opens multiple times in MSVS

I am creating an application with CPP and using the Qt Widget Designer for the user interface.
When I use the search window in MSVS for a certain widget object and scroll through the results, for each hit that refers to the GUI-file that same GUI-file is opened. So, if there are 10 references to that widget, MSVS opens 10 times that same window.

I did contact Microsoft about this. They suggested this: "Could you please set "Run in detached window" to "False" via Extension > Qt VS Tools > Options and re-check this issue "

But, the option "Run in detached window" was already set to false. MSVS seems to ignore that.
I tried to set it to True and than back to False again. I don't see any difference.
I see the same behavior on my other machine...

They replied: This issue seems to be caused by QT Tools for Visual Studio not Visual Studio. Please file a ticket with that product at https://bugreports.qt.io/projects/QTVSADDINBUG/issues/QTVSADDINBUG-878?filter=allopenissues.

So, here I am. Are there any suggestions?

I will attach a video to show the problem.