We’re pushing out a change to temporarily disable
PART messages on TMI as a performance optimization ( even if you request the
MEMBERSHIP cap ).
We’ll re-enable it for
MEMBERSHIP after e3, but this is the end of
PART for basic chat connections.
Moving forward, you will be required to request the MEMBERSHIP capability to receive JOIN and PART messages.
Update: e3 is now over and this is now in effect. Membership state events are now enabled, but only for clients that have requested the memberships capability.
Note: to get NAMES from a channel, you must request the capability before you join the channel.