Whenever a custom game ends, the music and voicelines from MVP characters play in the background but the post game result screen is not shown. You cannot see the scoreboard for the match and other details.
Still no scoreboard (Jan 31, 2026). It seems like a bug because the scoreboard still exists and can be shown via a workaround: after the game, if a friend invites you to their hideout, the scoreboard appears when you join. This worked last week at least