Calculating task graph as configuration cache cannot be reused because init script '../../../../private/var/folders/32/33qr05gj24jbrq7qvg4c1fjh0000gn/T/ijJvmDebugger1.gradle' has changed.

Any idea what might be causing this to happen from time to time?

based on the name I'd say that the config cache cannot be reused because IntelliJ is injected some script to aid with debugging

ij...

means it is a file the Gradle integration in IntelliJ IDEA creates to properly integrate with Gradle. If that file changes for some reason, the CC entry cannot be reused

(and

/private/var/...

is the temp dir on mac os usually)

What exactly changed, you would need to check what changed in that file and to evaluate whether it makes sense or whether IntelliJ needs to be improved