Factorio Forums

To reproduce:

• Play the Wave Defense scenario, and buy some upgrades.
• Lose to biters overrunning your factory.
• Start a new round in the same session.
• You still have the upgrades you bought in the previous round.

I think upgrades are supposed to get reset between rounds. Keeping them leads to very overpowered turrets and miners early on.

I suspect this was introduced in 0.18.30 when fixing this bug, since it's also related to resetting upgrades.

I encountered this in multiplayer, and haven't tested singleplayer.

Thanks for the report

Its fixed for the next release