Thank you for query in our forum. I am very sympathetic to your experience. I do understand the inconvenience it has made and apologize for it.
As per your description, when you insert equation in a text box and then group with another object, the placeholder cannot be hidden.
We tested in our side when we insert education in a text box and the group with another object it works as expected. See my test image below.
To move further firstly,
you can open Word in safe mode to check whether it related to add-ins:
1, Right-click the Start button (lower-left corner) in Windows and click Run.
2, In the Run box, type the command: word /safe, and click OK.
Note: To stop Office Safe Mode, exit and restart your Office application. It will start in normal mode unless there's a problem opening the application.
If this situation disappeared, you can disable add-ins by this way: Open Word>add-ins>Disable add-ins.
In addition, In order to check whether it because of third party applications, you can perform a clean boot in Windows refer to
If the issue still occurs, we’d like to collect some information to further check the scenario:
1. Is this a problem with all Word documents? Or some specific documents?
2.Could you please share with us exactly detail steps?
It will help for us to narrow down your issue.
3.Screenshot of your Word version: To check version: Open Word>File>Account>Product Information (Please mask your private message for protecting your private message)
We greatly appreciate your understanding.
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Thanks for your feedback, it helps us improve the site.
We appreciate that you spent your precious time doing those tests and shared the test results with us.
I do understand the inconvenience it has made and apologize for it. And we’re still glad to help you.
We tested on our side same as you mention in video and we can reproduce this behavior. We tested in four different channel Office 365 proplus e.g. Monthly, Monthly targeted, Semi-Annual and Semi-Annual targeted channel and we meet same behavior as
As we could reproduce this issue on our side, we would suggest you submit your feedback to the related team directly by the following method: