In v7.29 when you perform a /LIST, any channel that begins with two hashes (##) will not show in the Channels List. Other channels appear fine.

This was observed on the Freenode Network where many channels begin with ##. Eg, ##mirc

(P.S. They do appear in /debug output)

Right-click the Channels List window area > List Options... > uncheck 'Hide non-text channels'.

Thanks 5618. I'd suggest that "##" be omitted from that filter, since it's enabled by default.

I'd just suggest that the filter be off by default, since that's a weird experience for pretty much any scenario.