axic the pylon being lit up indicates that someone in the lobby at the start of the match had the Easter Egg side completed that’s corresponding to the colour that the pylon is glowing in. For the Easter Egg tracker box not showing any lights despite of this, make sure to not build any of the Gallows nor Guillotine parts before checking the Easter Eggs tracker box, as doing so turns the lights of the tracker box for until the Easter Egg is completed or until the map is restarted.
If you’re experiencing a message when loading up the game stating that your stats were restored from a backup, that might be the reason. The devs have said that a fix to that problem is coming in the next update. (Update 2024/12/13: version r4526 has been pushed which addressed the problem)
If you’re looking for a more immediate fix, you can get everyone to use the relevant console commands from my comment here: https://forum.plutonium.pw/topic/34450/bo2-victios-easter-egs-cheat/2