Yitzchak Zirkind writes:
On the topic of Girsa'os, I will share with you a Girsa change that answers a question. See Maharatz Chayos on Yuma 39a who remains with a Tzarich Iyun Godol on the Tos. Yeshonim since Rava holds that Mitzvohs Lav Leihanos Nitnu, however if you will look in the Rabbeinu Chananel his Girsa on the Gemara is that Raaba is the Baal Hamemra, hence no Stira.
Kol Tuv,
Yitzchok Zirkind