fix: filter should filter out null values

[simPod]

Fixes #4245

[simPod]

@tannerlinsley I suppose the autoRemove should somehow get involved so maybe my fix is in wrong direction?

Though I was thinking those tests might be valuable nonetheless.

[stephanvdhorn]

We currently experience problems because some of our values are null, so could this get a higher priority?

[ahammouda]

+1

[KevinVandy]

You guys can override the filter fns with your own custom ones to fit your requirements

[simPod]

Ofc but that's not a solution that benefits others nor systematic one. I'd like to solve it on library level though workaround are possible.

[KevinVandy]

Closing this in favor of #4441, as it got fixed in v8.5.26