ebtables bridge CMIP application layer to not shown in capture

I applied a Linux Ethernet bridge over my connection and then ran wireshark to look at the packets. Before the bridge was applied, wireshark could parse the CMIP layer fine (so when the packet came in it was classified as a CMIP packet) however when the bridge was applied the packet was still captured but it could only get as far as the ISO 8823 OSI Presentation Protocol layer so I couldn't see the CMIP data at all. Any idea why this is? I can't tell if this is just the bridge that cannot parse that layer and is leaving it off the packet or if it is wireshark not displaying it properly.