Out of sync game creating two concurrent games without ending the game

[Nerathion]

GAME INFORMATION

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• GAME BUILD #: 101.102.28520.0 (#94056) 12194550
• GAME PLATFORM: Steam
• OPERATING SYSTEM: Windows 10

ISSUE EXPERIENCED

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Hard to explain, but while I was playing a custom game lobby (Rage Forest 4 map), we got the ‘Out of sync detected…’ message in the game chat. We paused and expected one player to have dropped, yet everyone was present and able to talk, so we continued playing.

Well, instead the game somehow created two versions that were playing at the same time, where some players seemed to be AFK for other players and vice versa. The weird part is that the game did not crash - it might have later on, but we decided to just end the game ourselves through resigning. And we could all chat with each other even though some players were in the second ‘version’ of the game. I don’t know if a dump file exists because of that?

Watching the game back it goes out of sync at 0:19:18 in-game time, whereas we played on for at least 0:33:42 in-game time. So I’m not sure if the save-game is of any use, as it ends probably at the time it went out of sync.

FREQUENCY OF ISSUE

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First time it happened.

REPRODUCTION STEPS

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Not sure if it’s possible to reproduce steps. Host a game (on the Rage Forest 4 map), play until the out of sync happens?

EXPECTED RESULT

^{What was SUPPOSED to happen if the bug you encountered were not present?}

Not go out of sync or at least crash the game for all of us.

IMAGE

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What I saw:

What the person in different sync version saw:

Notice the difference in map exploration and score.

GAME FILES (SAVE / RECORDING)

^{Attach a SAVE GAME (.aoe2spgame) or GAME RECORDING (.aoe2record) of the match where you encountered the issue. Link it below if using an external file service.}
MP Replay v101.102.28520.0 @2023.10.10 000059 (4).aoe2record (2.3 MB)

[Felizon89]

Hello @Nerathion
First of all, thanks for the report.
In order to investigate desyncs, we need desync files from all the players involved in the match, these can be found here: C:\Users\your_user_name\Games\Age of Empires 2 DE\logs, and they have this format: XXXXX-2023.10.10-17.31.37-p#0-sync

[Nerathion]

Is this the file?
264459596-2023.10.10-00.12.47-p3-sync.txt (990.9 KB)

I can try to ask other players for their files if needed, or did you mean this file has the desync files from all players already?

[Felizon89]

I need that file, but from all the players

[AirmailAttic719]

I just had this exact same bug, first time too. I can’t upload anything from other players because i don’t know them.

[Solomon]

@Felizon89 This just happened to me as well, once yesterday and once today, and it also happened when spectating games
What happens at some point in the match is that yes, it gets out of sync and I keep playing on my “game” and the other 7 together in the normal game. Chat and pings are still working fine
I don’t have the file from all 8 yet, I might later but so far here is mine if it helps, I was the “culprit” I think, since I did have desync sometimes but the game would just consider me afk for the time I was desynced and sped me back up to current game time
Can’t upload to forum since I’m a new user, -1-2023.10.13-14.17.28-p0-sync_solomon

[Solomon]

Here is another one from a game I was spectating this time… I was watching a discord livestream of one of the players and could tell the game I’m spectating is desynced and I was probably watching the AI play -1-2023.10.13-14.39.27-p0-sync

[Nerathion]

I was unfortunately unable to get the file from all the players, some didn’t respond and some did not want to bother with it. I got 4 other files, however for some reason when I try to upload it, the forum keeps uploading my own file that I have uploaded above. Do you know how to work around that?

It shows as if it’s uploading the correct file, but then it changes to my file once it finishes uploading. But if only getting 5 files in total isn’t enough, maybe it’s not worth bothering anyway. Unfortunately the player(s) who seemed to be in the ‘different version’ did not send their file.

[Felizon89]

Unfortunately we can’t investigate the desync if we don’t have the files from all the players