No this is false. Tenure goes by the accumulation of Gold on your account. I assume OP has run out of Gold membership. If so, you must add at least a 3 month to see the tenure again.
Tenure is based on "continous" GOLD subscription. If you ran out of GOLD and you don't maintain it (meaning adding more GOLD 1,3, or 12Months) within a certain period of time, the counter will reset it automatically.