gsm_map "contains" filter does not work. Other protocols (e.g. sip, diameter, etc.) "contains" filter work

This issue was migrated from bug 15893 in our old bug tracker.

Original bug information:

Reporter: Emilio Alminana
Status: RESOLVED NOTABUG
Product: Wireshark
Component: Extras
OS: Windows 7
Platform: x86
Version: 3.0.2

Attachments:

HS_3G_VoLTE_call-extract.pcap: File containing sip, gsm_map and diameter messages