I just uploaded version 1.4 of the spawner which should fix this issue.
If you're curious about what the issue here was with altimit movement and the way my spawner recycles events... basically with altimit movement whenever an event is moving it is given a ._moveTarget = true property and also ._moveTargetX and ._moveTargetY properties. These properties had to be reset when unspawning an event since these events are recycled.
The events were respawning with flags that tell altimit when and where to move the event to lol.
I hope this works out for you! If you find any other issues or if this one somehow persists be sure to let me know!
Thank you!