Hi.
I hadn't hit this error yet - which phone are you using?
Would be nice if you could update https://osmocom.org/issues/3499 with more details: config, packet traces, software version, log output etc.
Also, is there any particular reason you use OpenBSC and not OsmoBSC?
If it's only meant for PS setup than migration should be much simpler compared to Voice/SMS case.
Having said that, if the reason is indeed https://osmocom.org/issues/1525 than it might take a while until somebody allocates resources to fix it.
Nevertheless, having as much details as possible documented in the ticket increase the chances that the error gets reproduced and eventually fixed.