Why are these keyframe-icons from a downloaded file so small?

Hello, I just tried out Adobe’s auto rigger called Mixamo to rig my blender-character. I made the character in blender first, and then saved it as a .FBX file and uploaded it to the Mixamo website. I then rigged it using their service and then downloaded the .FBX file again and imported that file into blender. I then noticed something I have not seen before.

The last vertical row of keyframes are the size that appear when I keyframe a pose and the others are from the imported Mixamo animation. Why are the keyframe-icons from the imported animation much smaller than the others?

Thanks in advance.