Unexpected crash & non-reponsive AI

In multiplayer, my friend and I have unexpected crash for unknown reason (no warnings, no error message). Almost all the multiplayer games we played are crashed unexpectedly. My friend crashed 1 time and I crashed 5 times. Both of us are windows 10.

When one of us crash, another try to save and restore the game. However, after joining the restored game, the AI are not playing anymore. Their villages and armies only stand there and do nothing.

Does anyone also suffer from same issue? Any solution to this? This is unplayable.