Ctrl+Shift+Drag doesn't work

Hello,

I usually use CTRL SHIFT DRAG to create duplicate fill-able fields and drag them (locked in line with their parent by the Shift key) to the next field. Now, when I release the mouse drag, it does not leave a new field where I had indicated; instead it leaves it exactly where the last field was. I cannot move it in any permanent way without it jumping back to where it was when I release the mouse. If I only use CTRL, it will work, but it's impossible for me to line all the fields in a 200 field form up in a professional way without using Shift.  Has anyone had this problem?

(I'm on Windows 10)