Massive FPS drop because of SU9

[HethrMasn]

@Bau1981

I enable DEV mode and disable it right away and everything goes back to normal

It sounds similar to the following issue:

Intense, frequent IO operations to kh_logbook.stmp causing bad stuttering

Are you on Xbox, Steam or Microsoft Store version? Steam Are you using Developer Mode or made changes in it? No Dev Mode Brief description of the issue: Ok performance while the plane is stationary, but when it starts moving, there is a terrible stuttering. There is a circular loading icon that pops up in the bottom right corner of the screen while it’s stuttering. I noticed that there is very high disk usage, and found that the kh_logbook.stmp is constantly being accessed while it’s stutte…