A test KP performing JOINs to a SIB (0.9.1) in a loop fails randomly after consecutive 60-120 JOINs, (or sometimes works without problem even after 10000 JOINs).
This occurs only if all consecutive JOINs are made with the same node_id. If the node_id changes between iterations, everything seems to work. SIB v.0.9 also seems to work.
Testing was done with a KP using an unreleased ANSI-C api.