Please note that you may have to be identified as the channel founder/owner before you'll get the help you're wanting.
In my experience channels with mode +i do not force you to join another channel, however, if it is mode +I then there is an alternate channel specified where people are forced to go to.
By identifying yourself as the channel owner, you should be able to issue
which will remove that setting and the automatic force to the alternative channel.
NOTE: Replace #channel with your actual channel name.