Looks like IOI's plans to appear on a radio show have not gone quite the way they wanted.
According to a report, they were supposed to be appearing on SBS powerFM's 'Choi Hwa Jung's Power Time' on the upcoming May 4, but the schedule has suddenly been canceled/postponed. The portion of the radio show's home page where questions could be posted for IOI to answer the show has likewise disappeared.
On May 2, 'Choi Hwa Jung's Power Time' told OSEN, "The master control room where the broadcasts take place is small, so it is realistically impossible for many people to come out and talk in it. We said we should use a large studio, but we were unable to secure it beforehand. There's no point in not having all 11 members of IOI, so after we secure a space, we plan to invite them again."
Hopefully it will still happen later!