KMBS/23 N0340F130 DCT GRAYT LAYKS2 KDTW/22R (Simbrief, imported into G3000 MSFS 2024 SU3 1.5.17.0, Livtoair CJ3+). For me a reproduceable issue - as I approach the GRAYT wpt about to enter the leg from GRAYT to LAYKS, the aircraft initiates a turn to the right and continues the turn until I intervene. Then, when I try to enter a DIR to MCHGN to recover, the FMS accepts it but no leg is drawn and thus the aircraft cannot fly to the wpt. So something seems to really get messed up in the FMS associated with the flight plan. The FP is drawn out correctly at the time of import and during the flight. I added the ILS PRM Y Rwy 22R apch to the FP after takeoff fyi.
I import the flight plan using the Simbrief option in the GTC. I can fly many other routes successfully.
Kirk