I recently upgraded to LED's on my 1986 Williams HS and noticed that my "Special" lights (both left and right) were not operating (lamps 04 & 05 on lamp matrix). When I went into diagnostics (individual lamp test mode) I confirmed that they were not blinking. What I also noticed that there were several seemingly random playfield lights ghost blinking. I then checked other lamps using the test and found similar issues, for example the Lower Left Target Bank Yellow (lamp #14 in matrix) blinks as it should but several playfield lamps ghost blink along with it ("BONUS", "ESCAPE", & "GETAWAY"). See attached pictures.

Is the loss of my Special lamps somehow caused by my use of LED's in other seemingly unrelated lamps within the playfield, or is there likely another root cause?

If High Speed is not supposed to require non-ghosting bulbs, why would I be seeing ghosting in so many locations during lamp test mode?

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Understood. Thanks.