Haltech long term fuel trim

Hi all, I have noticed that my long term table keeps populating with very similar numbers even after I apply them to my base fuel map, specifically around idle even though the short term trims are very little at idle, could this have something to do with deceleration?

Attached are some pics of the trim table and the base map.

Cheers

Is there a WBO2 on it? I'd be interested to know what that is reading. 25% is a lot for LTFT, usually you would want values under 5% or so. Without asking a million questions about the setup its probably worth checking injector deadtime and low pulsewidth adder settings which have more effect near idle. Also I'd review the MAP calibration in that area. Last thing to check is just for vacuum leaks around the intake. A carefully placed shot of flammable brake cleaner does a nice job of that. On normal decel your RPM would be higher so if that was an issue you would likely see the trims along the edge of the map at higher RPMs.