Strange problem with import/place image

InDesign CC 2019 14.0.1

Mac OS X 10.14.3

I am having problems importing an EPS image into InDesign.

I have various layouts with master pages and templates set up. On a regular basis, I have to update a particular graphic (among other elements) in the layout. For years, my workflow involved simply deleting the contents of the old image box and "drag/drop" the new image in place. Both images were the same exact size, so this worked well.

Recently, this has stopped functioning properly. The images involved are EPS files (vector) generated in a 3rd party software.

When I try to drag/drop the image onto an empty image box, the image at first appears in the box. Once I let go of the mouse button, the image disappears from the box and the regular "place" graphic appears. I can then click to place the image on the layout in a new (not existing) box.

The same thing happens if I choose "Place" from the "file" menu. The existing image box will appear to accept the image, but then I get the small image with a cursor, forcing me to place the image in a new box.

Oddly, this only happens with an empty image box. If the box already has an image in it, drag/drop and place work as expected (the new image replaces the old in the image box).

It also only happens with EPS images from one software package. Other images place normally. The images open up with no issue in Illustrator. Once placed on the page, they output/print without any issue. The import issue, however, is killing my workflow.

I realize the problem may be all or partly the fault of the way the other software generates EPS files. Can this be an InDesign issue? What would cause a problem like this? I am contacting the company that makes the other software, but don't know what to tell them about a possible cause.

Any ideas?