Sorry cannot reproduce your problem.
Scaling remains the same after applying Gaussian Blur.
Try an oldfashioned workaround.
Apply Gaussian Blur to the clip in another sequence and then nest in the original sequence.
Thanks for checking. I forgot to add that I had it cropped also. I may be me missing something in the process. If I can't figuere it out I'll use your workaround. Thnaks again.
Try stacking your effects in a different order. The crop is probably in the wrong position.
That's the first thing that came to my mind...the order. I tried that and it did no good. I'll go back to that part of the project and see if it's still doing it. I added a directional blur and it worked. HMMM...