AI Actor stops movement unexpectly

Hi. I have AI actor with simple behavior tree

Actor should move to point on level, spawn station actor, move close to corner of navmesh and at final destination destroy itself.
Everything working fine exept one thing: after spawning station actor, AI actor starts moving to final destination, but after short period stops and after few seconds continues movement.
And i cannot understand why AI doing that short stop. Cam someone give me tips how to fix it?

There is AI actor setup

Level setup

And level blueprint