Long story short, depending on the target jet, the F-18's TWS is causing the target's RWR to provide missile launch indications immediately after the shooting aircraft launched. This was tested with the F-15, F-16, and F-18 as targets. The target F-16 and F-18's RWRs demonstrated this issue. For the F-15 as the target, TWS was working as expected, providing only nails indications until the missile went active. Other aircraft were not tested as targets.
Track file can be found at the following link, as the file size was too big for the forums https://drive.google.com/open?id=1V3MgqeOQ6LLt6BVlZqW1EZa4P5-UcWZU