I don't think Nova's TeamSpecificActors are Assault-compatible, i.e. they are locked to team numbers, not attackers or defenders.
All TeamSpecificActors are COMPATIBLE WITH ALL STOCK TEAMBASED GAMETYPES and custom gametypes where the teams don't change bases between round too. The actors have been made compatible for Onslaught and Assault, gametypes where teams do change bases. On reset, actors that were first owned by the red team, are automatically owned by the blue team and visa versa.