This issue has been solved by the ergo in that it integrates the bouncer functionality into the IRC server. So from everyone elses perspective you never get disconnected and combined with support for the chathistory extension (which your mobile IRC client has to support) you won't miss things happening in between either.

But that being said, the mobile phone essentially killing all open tcp connections is not really that great of a thing. IRC is not the only protocol that suffers here, but also IMAP IDLE push notifications suffer here.