Simulacrum - Monsters stuck outside of area

What the hell. This is the 2nd time today, first with Kosis and this time it's just a normal monster stuck outside the arena. Wasted 50ex earlier for t1 sim, now was thinking of getting the t2 sim done and yet on the first try, I get this...? Waste of 200ex. If it's going to be like this, what's the point of wasting money on sims when it's so expensive and can potentially brick like this? Smh.

ID: 453922074

Edit:

Was able to kill the Rage monster with a projectile skill until I saw that there was also another monster next to it and I can't see it's model but was able to mouse over it. This time I wasn't able to damage it with any other skills. What the hell... This is a total disappointment along with the many crashes, freezing, and fps issues. What a total letdown.