Essentially, the Pulley block's compatibility with Farmer's Delight's rope is limited, in that while the pulley can wind up an arbitrary length of rope (and the block at the bottom) just like with Supplementaries' rope, but cannot unwind a length of more than 1 rope if there is a block hanging at the bottom.

Minecraft version: 1.19.2
Tested on Forge version 43.1.47 with mod version 2.2.34b and Forge version 43.2.3 with mod version 2.2.35t
Client: Curseforge standalone client

Steps to recreate:

1. Fill Pulley with Farmer's Delight rope.
2. Extend the rope using a Crank or turntable, to the point that it reaches a block.
3. Retract the rope (and block) fully using the same.
4. Attempt to extend the rope once more, which gets stuck.

Rope unwinds by itself with no issue:

Rope retracts with a block with no issue:

Rope cannot unwind fully when a block is attached.

Quark's rope has no such issue:

Tested this on 1.20.1 Fabric version - bug also confirmed.
supplementaries-1.20-2.8.10-fabric
farmers-delight-fabric-1.4.3
fabric-api-0.92.0+1.20.1
moonlight-1.20-2.11.9-fabric

With farmer's delight rope: with no block unwinds on full length, with block unwinds only 1 time. With native rope works fine.