Drag and drop and smart object

Hi everybody!
I have a little problem with photoshop drag and drop functions. (I'm a school teacher and 'couse that not I'm the only who using the computers and the programs.)

So the problem:
Previously when I drag and droped a file into Photoshop it appeared as a smart object. But somehow (maybe some of my colleagues set something) now if I want to drag and drop anything in photoshop it appears as a raster image not as a smart object! 😞
How can I set that back?  It was so practical and use full...

Someone help me please! Cause it happened in more computers in the school and i don't know how to fix it for my students.....

Thank you for your help!
Dorka