FilterMutectCalls change between 4.0.2.1 and 4.0.3.0

I tried running FilterMutectCalls on a VCF generated with Mutect2 for matched tumor-normal samples. With 4.0.2.1, I get some variants that are labeled PASS as would be expected, but with 4.0.3.0, I get 0. I could not find any documentation that explains such a big change in behavior. Is this a bug? Or did I have variants erroneously labeled as PASS before?