I have found that the installer does not normally replace the rubber seal when they do a windshield because of the additional cost. The seal is relatively expensive when compared to their cost for the glass. So, they reuse the old seal and deal with any leaks, after the fact, with a caulking gun.

I would think you would want to provide them with a new seal when you bring the vehicle to them to ensure that you achieve the desired results.

My old 123 when through this same issue and it never got completely resolved. It could still drip a bit in a very heavy rainstorm.