Yeah the L-points are meant to queue you in for the local traffic because thats how you make a “simulator” game, but it is true that the queue is kinda buggy and allows NPC ships to cut in line
The solution: Use L-points manually. Open up the starmap and press “up” on the L-point to bring up the possible destinations. You can enter the L-point any way you want while flying at any speed, I usually just slam my thrusters and run enter through the L points through the sides.