Sometimes the phrase "Click here to add keywords" gets added to keywords.

I am on Lightroom Classic 12.0.1 on Windows. This problem has been happening for many versions. I don't have the situation happen often so have never reported this.

If I have more than one photo selected and enter text into the Title field then click on the field that says "Click here to add keywords" I have a pop-up that asks me if I want to apply the metadata change to all selected photos. Simultaneously Lightroom adds the phrase "Click here to add keywords" as a keyword to the selected photos.

If there is only one photo selected, when I click on the field that says "Click here to add keywords" it works as you'd expect. The title change is finalized, you get a cursor in the keyword field and the phrase "Click here to add keywords" is NOT added to the photo's keywords.

If you have multiple photos selected it works right if you click the "Enter" key to commit the change in the Title field, click on "Apply to Selected" in the pop-up, then you can click on the "Click here to add keywords" field and type in your keywords.