I'm pretty sure it's a load issue. They probably don't have enough machines available. As well as if they are using a SQL database, it only scales vertically. I would they use DynamoDb or another NoSQL store. That or they need a bigger database instance.

It's a simple conection problem that the provider of the service should fix off, same problem as when they have some kind of issue with intercontinental optical fiber cables, what forces us to use alternative and longer routes to reach the same server.

same thing happened last time during this event :x ..wait/reload

I'm not sure it's entirely an AWS thing; the game works fine for me doing everything except:
1) Last hit on a boss, or
2) (Sometimes) clicking a Chance card.

I have even had times where the game crashed when doing a minimum hit on a boss, reloaded and hit it again with a minimum (this time the minimum calculated a % that would not kill the boss, it did its damage instantly with no lag), and then when I hit minimum again (this time an assured seduction finish) it crashed again.

I have problems with:
1) last hit on bosses (50% of the time I have to reload)
2) N-Gacha (50% of the time I have to reload)
3) Chance spins (50% of the time I have to reload)

Otherwise the game works fine.

When they interduce a new slayer in N-Gacha the bug costed me 100-200 reloads
When I spend a lot a puddings to kill a super boss it so anoying to have to reload the game and see somebody else got the last hit kill because of a crash..

*** Update Lag has gone after todays update ***