Cannot read property 'overlaps' of undefined

[XWILKINX]

Getting this error (seemingly) randomly:

TypeError: Cannot read property 'overlaps' of undefined
at Function.Broadphase.aabbCheck (/root/dinogen-mp/node_modules/p2/src/collision/Broadphase.js:92:27)
at NaiveBroadphase.Broadphase.boundingVolumeCheck (/root/dinogen-mp/node_modules/p2/src/collision/Broadphase.js:110:29)
at NaiveBroadphase.getCollisionPairs (/root/dinogen-mp/node_modules/p2/src/collision/NaiveBroadphase.js:41:53)
at World.internalStep (/root/dinogen-mp/node_modules/p2/src/world/World.js:632:29)
at World.step (/root/dinogen-mp/node_modules/p2/src/world/World.js:543:18)

Any ideas as to what causes this?

It only happens when using p2 through the npm module, and not with the version included in Phaser 2 CE, which I'm using client side.