permanent "out of sync with the server" error

[ManGalori]

At attempt to storm a city in game #4646 (Welcome, map Westeros), there is a message.

The game is out of sync with the server. Trying to load back data from the server now.
If you notice any specific bug causing out of sync errors, please report this on the forum.

Then all fades in a kind which it is possible to see on the attachment screenshot. If to reboot page game comes back to an initial condition before city storm. The situation repeated some times, in different browsers (Opera, FireFox).

[ManGalori]

The error repeats and on other computer, with other browser (Chrome).

[ManGalori]

Has bypassed an error having changed structure of an attacking stack.
Stack giving out an error:
Hero, Orc, HI, Scorpion.

Stack without an error:
Hero, Orc, HI, Scorpion, Eagle

[SnotlinG]

Thanks for reporting.
Will investigate, but definitely looks like an issue with the Hero Flying, and then attacking without his mount.
But looks like your original attack-stack should be OK though

[SnotlinG]

Has now been fixed in Beta5 code!