Sometimes when our scholars rejected report in praise of Ahlalbayt, because narrator of such was rafidi, we seen shias raising their voices that this is not fair.
However, even shia scholars use to accept reports from innovators in their mazhab, and reject them if reports was supportive for those innovators.
Waqifiyah was a mazhab amongst shias, which emerged long time ago, and they didn’t believe in all 12 Imams as modern shias do.
Shaykh of shias, Muhammad B.Majlisi in his “Biharul Anwar” (51/41) was discussing narration, and he said:
مع أن بعض رواة تلك الاخبار من الواقفية ولاتقبل رواياتهم فيما يوافق مذهبهم
Along (with fact that) some narrators of this reports were from Waqifiyah, and they reports are not accepted if they in line with their mazhab.
So as it obvious shia muhadith accepted reports of innovators, and refused to accept them if that reports were ammo for their mazhab.