Bart-
NIM087498 is still active and valid in the system. It was logged at 10.1 sp1, and in terms of mobile, there have not been that many changes to the MPC or caching tools since then. So, it could be that you are still hitting this bug. Have you logged a ticket with Support yet? If not, I would encourage you to do so and that way we can troubleshoot the issue. Thanks!