What is happening here with this Rhyncho Gigantea

[bambruso]

New leaves looked heathy then this new leaf started these brown sport and now it looks like to 2 spikes are dying? I’ve taken him on night below 60. Gets watered by sprinkler and this is ground water. Please help!!!!

[estación seca]

That's cold damage. These are hot growing plants. They may survive 60 F / 15.5C briefly if they're dry, but not on a regular basis, and not while wet.