Having issues with resizing images in Adobe

I can't resize images or boxes in InDesign or Illustrator without distoring the proportions. Usually shift + click would do the trick, but lately it hasnt been working. I've tried command + shift + click as well and it hasn't worked either. This happened after I opened a template from class but nobody else in my class has reported this issue and the issue has extened well past that project. I can't imagine a file doing something like that to 2 different software programs and most likely it was something I unknowingly clicked on, but that was the first time I noticed it and I have no idea how to fix it. Any and all help would be really appreciated!