Tool/software:
We have a high density application that is using the OPA835 in the RUN package. A controlled impedance line is forced to run adjacent the FB1, FB2, FB3, and FB4 pins.
To maintain the integrity of the coplanar wave guide all 4 of these pins have been tied to ground.

Are there any internal connections in the OPA835 not shown above that would cause unwanted current draw or any other unintended consequences when the FB pins are grounded?