908.32—Collateral attacks on proceedings under this part.
If a respondent files in any court a collateral attack that purports to challenge all or any portion of a proceeding under this part, the hearing on the merits shall continue without regard to the pendency of any such challenge action. No default or other failure to act as directed in the hearing within the times prescribed in this subpart shall be excused based on the pendency of any such challenge action.