Proxy/Timecode breaks cropped strips

I recently added a proxy/timecode to a project of mine, and scrubbing/playing the video is super smooth. Unfortunately, the strips that I had that were cropped and offset don’t show up.
Edit: I tried adding a crop/offset to another, unedited strip. Cropping works as usual, Offset makes it scale down (in the same way that adding an image smaller than 1080p to a 1080p project stretches the image, unless you add an offset).
Edit 2: Is there any way to use a proxy for only some strips?