In May, PAS declared it has decided to end political cooperation with PKR. But the latter continues to be opaque on this matter.
The issue took another twist when PKR deputy president Azmin Ali revealed last week that informal discussions are still taking place with the Islamist party.
The next day, Kelantan PKR announced it would retain its political appointments in the PAS-governed state government, fuelling more unhappiness amongst the faction which wants PKR to cut ties with PAS.
On Wednesday PKR's Selayang MP William Leong resigned from the party's political bureau, citing the continued engagement with PAS as the reason.
In Kelantan, PKR grassroots are collecting signatures in a bid to oust the party's state chief Ab Aziz Ab Kadir and state Youth chief Hafidz Rizal Amran. The pair is seen to be close to PAS.
Malaysiakini understands that at present, sufficient signatures have been collected with regard to Hafidz but not Ab Aziz.