Forge 1.6.31 multiplayer crash when my opponent scry.

Was playing with my friend and we found that each time he have to scry, he get "error connection with host lost." In this case, i am the host.
Repro step
1. open forge 1.6.31.
2. connect two player in muliplayers.
3. have the non-host player scry.
4. observe he lost connection.
Thank you for your time.
By the way, this behavior was not present in 1.6.29.
We are using that version as a work around at the time.
Repro step
1. open forge 1.6.31.
2. connect two player in muliplayers.
3. have the non-host player scry.
4. observe he lost connection.
Thank you for your time.
By the way, this behavior was not present in 1.6.29.
We are using that version as a work around at the time.