(3) If the maturity is not stated or fixed and the conveyance is not dated, title to real property conveyed to secure a debt or debts shall revert at the expiration of seven years from the date the conveyance is recorded or, if not recorded, is delivered;
provided, however, that foreclosure by an action or by the exercise of power of sale, if started prior to reversion of title, shall prevent the reversion if the foreclosure is completed without delay chargeable to the grantee or the grantee's heirs, personal representatives, successors, or assigns.