Any other books in the industry that do this? Far from industry standard.
BetOnline
Pinnacle:If a game is abandoned or postponed for any reason, all wagers will stand provided the game is played or re-started within 24 hours of the original kickoff time.
Bookmaker:If a match is suspended before full time is reached, and not completed the same day, (local time of the match site) wagers on the outcome of the match are considered void and all stakes shall be returned.
SBObet:If any match is abandoned or postponed all bets will be void unless the relevant market result has already happened.
All bets placed will be refunded if an event is suspended or postponed, and not resumed within 12 hours from the scheduled commencement time (unless otherwise stated in the particular sport rule).