[XDCR] Adv filtering some number functions not working as expected

According to the design doc, niql number functions are supported in adv filtering, but ASIN and ACOS functions are not working as expected.
https://docs.google.com/document/d/19PkXWG8ovTS-E7l2Fqg_kRwsPTh_wHhjrrFBFPOWzQs/edit?pli=1#heading=h.jue93z4nyvp5

However, ATAN() in adv filter matches niql results.

doc:

{

  "string_short": "x",

  "string_medium": ")nx.\n\tPfDEEptfV2o",

  "int": 93,

  "float": 16.770881608010846,

  "string_long": "KfdVIYXB4Hk@uA9ZrChdOGP\r^lEd/l lQaAEoqGTfznioxXTsxlDy\fkBWmIiAe\nRPqm6.-\\RK%ZE&WzSn)rvt_IJi",

  "string_vlong": "egof$\ryps<QmEaQhg",

  "bool": false

}

working filter (the doc matches this filter and is replicated to target):
ATAN(int)<>3.05682983181e+307

not working (doc matches filter but is NOT replicated to target):
ASIN(int)<>3.05682983181e+307
ACOS(int)<>3.05682983181e+307

Following queries return 1 when the above doc is present in src:

SELECT COUNT(*) FROM default WHERE 'ACOS(int)<>3.05682983181e+307'

SELECT COUNT(*) FROM default WHERE 'ASIN(int)<>3.05682983181e+307'