Found a weird buggy thing, but I haven't got access to another MX65W to replicate it.
We have an MX65W where entering any filter expression results in no traffic being shown. If you run the capture with no filter, you get the usual sort of traffic for your verbosity level. You can download a pcap, pop it in Wireshark and it's everything you'd expect. Add a filter expression, and you get this:
Support's suggestion was to just chuck it into Wireshark, which is fine. But I can't replicate this behavior on other models. So far, I've successfully filtered dashboard output on: MX64, MX64W, MX65, MX67, MX84, MX100.
Anyone else seeing this with MX65W? We've replicated this problem with this one device on three separate admin accounts and computers.