Apparent tick limitation for mu custom goal

Hello !
 

So I try to code a custom goal where my Manta Ray would swim constantly and most importantly follow long route without any turns, but it seams that I have a 102 tick limits on my goal which automatically reset target position before my manta can reach the previous one. I tried multiple things, but nothing seams to work... Please feel free to look at my data and the code and if you have any idea on why it would really help me ! thanks :)

When set to a radius of 8 blocks around (-8 to 8)

when set to a radius of 16 blocks :

when set to a radius of 32 blocks :

 

The code :

class ContinuousSwimmingGoal extends RandomSwimmingGoal {
        public ContinuousSwimmingGoal(WaterAnimal mob, double speed) {
            super(mob, speed, 40); //tried with 100, 200, 400 no changes
        }

        @Override
        public boolean canUse() {
            return true; // Always allow this goal to run
        }

        @Override
        public void start() {
            super.start();
            long currentTick = this.mob.level().getGameTime();
            System.out.println("ContinuousSwimmingGoal: Current tick: " + currentTick);

            Vec3 currentPos = this.mob.position(); // Get current position
            System.out.println("ContinuousSwimmingGoal: Current position: " + currentPos);
            Vec3 randomPos = getRandomWaterPosition();
            if (randomPos != null) {
                // Debugging output for chosen position
                System.out.println("ContinuousSwimmingGoal: Target position: " + randomPos);
                this.mob.getNavigation().moveTo(randomPos.x, randomPos.y, randomPos.z, this.speedModifier);
            } else {
                System.out.println("ContinuousSwimmingGoal: No valid position found for swimming.");
            }
        }

        private Vec3 getRandomWaterPosition() {
            for (int i = 0; i < 10; i++) { // Try 10 random positions
                double x = this.mob.getX() + (this.mob.getRandom().nextDouble() - 0.5) * 64;
                double y = this.mob.getY() + (this.mob.getRandom().nextDouble() - 0.5) * 8;
                double z = this.mob.getZ() + (this.mob.getRandom().nextDouble() - 0.5) * 64;

                BlockPos pos = new BlockPos((int) x, (int) y, (int) z);
                if (this.mob.level().getBlockState(pos).is(Blocks.WATER)) {
                    return new Vec3(x, y, z);
                }
            }
            return null; // No valid position found
        }
    }