Our 6 month old T6.1 CamperKing conversion has developed a strange sound coming from the roof. Whenever a front wheel goes over a pothole / deep drain cover / etc. there’s a sharp sound like a crack from the front roof area. Only when it happens on one wheel so I presume the chassis is flexing slightly and it’s not the pop top as we can make it happen driving slowly around a yard with the pop top up. I’d be grateful for any ideas or suggestions.