You might be interested in the previous thread about OR operators. You can try:
{
"bold": {"datatype": "func", "task": ["nback","mid","faces"], "suffix": "bold"},
}
Other BIDS stuff:
*distortionmap is not a valid fmap suffix
BVAL and BVEC files should not be in fmap either
I believe PA/AP need to be capitalized for certain softwares.
Best,
Steven