I’ve done some flying in the latest version of the WT CJ4 lately and noticed what seems like a fuel bug of sorts. On most flights (or pretty much everyone I guess) I all of a sudden notice how I have lost quite an amount of fuel.

Yesterday, I flew ESMS-LOWI and on taxi out to the runway at ESMS and just before I was about to line up, I got a fuel imbalance warning. Checking the fuel, I suddenly lost about 500 kg in the left tank. I filled it up and took off. When passing FL100, I checked the fuel and now I lost about 500 kg in both tanks. I took off with about 2.2 tons of fuel and now I only had about 1 ton left (about 500 kg in each tank). In order to get to my destination, I had to “refuel” midair. Not very realistic but since loosing fuel like that isn’t either, I used that as an excuse 

Someone in the WT CJ4 Discord channel confirmed this is a known bug they haven’t figured out but thought I would ask in here as well if others have seen the same thing and figured out what is causing it?

When this has happened to me, it always seem to happy quite early in the flight. While still on the ground or during climb. During cruise and descent, I’ve never lost any fuel like this.

I have started to really like the CJ4 but this issue takes away quite a bit of the fun flying it.

I've done a few dozen flights in the WT CJ4, but have never seen this. Maybe it's a memory leak.

Well, then I guess you should consider yourself lucky. Since I had it confirmed this is an already known bug with the WT CJ4. Not sure if also the default CJ4 without the WT mod is affected.

A memory leak resulting in a fuel leak...that would be a first I think 😁

This fuel imbalance while taxiing (approx.500kg) happened to me yesterday for the very first time after many many flights.

Good to hear I'm not the only one in here having seen this. 

I think this happened to me too.  Wasn't keeping too close track, but noticed about an hour into flight that I was well down from where I should have been.  Thought maybe I set my levels wrong, but bet it was this.

Yes, that sounds very much like the same thing we're discussing here.