Certain clip frozen after exporting

One of the clips for the video I'm editing has been acting strangely, freezing on a random frame when I export it nd acting like a still image even though it's a video in Premiere and works like one when I open the file on it's own. It's box in the timeline is also lavender colored, unlike the other video files that are blue by default. I am fairly new to premiere and I can't seem to find much info on this, so I'd appreciate some info on how to fix this.