Running 2.9.1 of Stone Zone, was originally using 2.16.5 of Moonlight Lib, updated to 2.16.8 but still experiencing the issue.
Issue is only happening for Stone Zone. Seems to be limited to "brick_bridge", "brick_bridge_pier", and "brick_bridge_stair". All items belong to one of those 3 categories, and I do not see any from those categories that are not missing a texture from Stone Zone. Does not seem to effect "balustrade_brick_bridge" items.
Log is attached.