you haven’t set the rotation values inside the LERP node. (-90 and 90 for z rotation)
you must put 0 inside the Compare node.
detach the event tick to the last node. It’s wrong.
Just follow my graph. I have tried it and worked for me.
If you want an instant rotation, then you shouldn’t work with timeline. You need to have two ‘set world rotation’ nodes.
Your retrigerable delay node is not set correctly. Please remove it and first follow my graph. Leave delay for later corrections. Besides if you want to have an instance rotation, you don’t need delay node neither.