I've got a SID RCT3 fork installed on my SS hardtail, and I've noticed that after I pop off of small lips in the trail I get this strange rattle in my front end, almost like the headset is loose. I've checked the headset adjustment several times, used synthetic grease to hold the bearings in place more securely, and recently rebuilt the fork to include replacing the wiper seals. None of that has eliminated the small rattle-like feeling I get once the fork fully rebounds to the end of its stroke.

Does anyone have any thoughts on what the issue might be?