Incompatibility with distant horizons/alexs caves when using spy glass.

[AngelOfCreation]

When left clicking with the spy glass, the game crashes.

https://mclo.gs/yjuTL86

[AngelOfCreation]

It actually may be due to Alex's Caves. I've tried it with both the unofficial port and the official, unreleased port built from https://github.com/crabsatellite/AlexsCaves.

https://mclo.gs/Okk66P0