GEOM_CYLINDER behaviour unexpected (low-poly)

[LJKS]

Context: Trying to port Multi-Agent Competition Gym to PyBullet
Creating a GEOM_CYLINDER as a base to place multiple Ants on I realized that the Cylinders I create as Arenas are extremely low-poly polygons if large, e.g. (sample code is copy-paste from respective project, hopefully still readable)

        ground = p.loadURDF("plane_transparent.urdf", useMaximalCoordinates=True, physicsClientId=self.clientId)
        arenaVis = p.createVisualShape(shapeType=p.GEOM_CYLINDER, radius=self.arena_radius, length=0.01,visualFramePosition=[0,0,0], visualFrameOrientation=[0,0,0,1], rgbaColor=[0.5,0.5,0.5,0.5], physicsClientId=self.clientId)
        arena = p.createMultiBody(baseMass=0, baseCollisionShapeIndex=-1, baseVisualShapeIndex=arenaVis, basePosition=[0,0,0.01])
        p.setCollisionFilterGroupMask(bodyUniqueId=arena, linkIndexA=0, collisionFilterGroup=0, collisionFilterMask=0)

Typically results in very low-poly polygons (visually 6-9 vertices), but sometimes (randomly) it seems to be much higher poly.
Possibly this is expected, sorry for your time and effort then, but this seems unexpected as a user and thereby possibly noteworthy.

--> Solution for me is probably just loading a cylinder from a file (I can't see any obvious internal solution, but I'm also completely new to PyBullet and physicssimulations tbh), but as it seems unexpected I wanted to report the behaviour.