SIM Trace Appears to Stop Processing APDUs

Environment: We have tested on three systems with both Ubuntu and OpenSUSE. Additionally, we have tested with both VMs and as a core system install. Software Installed: Installed the latest using the instructions from the user manual. Issue: With testing against all three of the SIMTrace modules we purchased we have found the trace appears to lock-up or freeze randomly through processing of the APDUs. Since the phone still functions properly I am assuming that the communication between the SIM and the phone are still intact, it is just an issue with the output to screen/file output. Has anyone else experienced this issue? We will try and flash the firmware, but since we saw this issue with all of the hardware we purchased we assumed there might be some other issue. Thank you. Jonathan