Bug: sometimes AQ will pass early if I go to another branch in Sabaki frontend

[OneMoreSecond]

Environment:
AQ 2.1.1 mini_win release / windows10 / Intel i5-2450M / AMD HD6770M
Sabaki v0.33.2 frontend

Reproduction:
Let AQ play with another AQ, and manually branch several times on a board with over 100 moves.
It can be helped by going back one step and regenerating it.

Example:
sgf file

console output:

Similar problem:
If I use Gogui frontend, the frontend will crash directly.
LeelaZero backend has similar problem.

[ymgaq]

Maybe due to undo command bug. See #58
The cause may be clarified if you show the command sent by the GUI client.

[ymgaq]

This issue mentions an older version, or hasn't been discussed in a long time, so we close it.