This is a recurring bug that was solved in a few past updates, but, it's back in InDesign V. 18.5.

When you copy a transparent background PNG from Google Images (or any website) and paste it into InDesign, it will display a black box as the background.

If you paste the same image into Photoshop, copy that, paste it into InDesign, it will not show the black background.

This was working 100% flawlessly over the last year, but, is now broken in this new version on multiple Macs. Tried different browsers. Reset preferences, same issue.

This was a bug that has come up multiple times over the years, and seemingly was solved for quite awhile, until now upon its return.