No save so yes you simply disappearNo save, and the target vanishes?
Magic resistance doesn't work?
Broken?
If you care about the rules as written, the way it works for these guys is:Specifically says that Goristros, which have Magic Resistance, are automatically exempt, as are Minotaurs.
3) When the spell ends, the target isn't dazed, stunned, or anything else. Not even surprised or suffering disadvantage. Basically all you can do is cast forbiddance and hope the DM doesn't decide that forbiddance and maze doesn't interact by just having the mazed target show up outside the forbidden space after it gets out of maze, someone else in your party can cast some buff spells (because "I turned the corner and was surprised to find Orcus" happens so often in D&D), run away (maybe 10 minute head start), or get healed up because the mazed critter has been pounding on your party. [Don't get me wrong, if the scenario is "we need to steal something and a golem is guarding it" maze is a pretty sweet solution.]
Other things that you can do, in rough order of decreasing obviousness:
(1) Cast party buffs like Haste, Circle of Power and Protection From Evil to maximize your action economy.
(2) Ready actions (like Eldritch Blast) for the instant the creature returns.
(3) Summon creatures like Elementals to attack the creature the instant it shows up (e.g. Conjure Elemental has a one-minute casting time, not usable in combat normally)
(4) Fill the creature's space with nasty damaging combos such as Wall of Force + Cloudkill
(5) Scatter caltrops in the creature's space and all around
(6) Create partial cover for yourself against the creature when it returns
(7) Use Mold Earth cantrip to wall the creature in with thousands of pounds of dirt berms
(8) Lure other monsters into the area to fight with the creature when it returns
(9) Fill the monster's space with water and use Wall of Force to drown it.
Think of Maze as a whole-party Timestop with a longer duration and fewer restrictions on environmental interactions.