Anyone with ITP get (a lot) better platelet counts following surgery

I've had chronic ITP for about 3 years now. I needed total knee replacement surgery and it took 2 months to get my platelets high enough for the surgery to take place. My average platelets then was in the 50-60 range and increasing my eltrombopag got it up to 70+.

Since surgery my platelets went through the roof. As high as 349! 6 weeks past surgery, and my platelet count is in the 150s. Very strange stuff. Anyone else have this experience?