We have recently changed a thing about VRay Lens Effects - now when you render with VFB you need to enable and set the Lens Effects through the VFB controls.
VRay Lens Effects settings from Environment And Effects panel (8) are ignored when Enable built-in frame buffer is on. This way they could be better adjusted as part of the post process.
There also was a case that Object ID and Material ID was ignored in Lens Effect via VFB. Was that fixed?
The workaround was to set it up via Environment And Effects…