I think your clan leader has to change your status from an inactive member to an active one
Are you trolling me?
Any clan leader knows that the clan leader cannot turn a member's status back to active, it must be done by the member. The clan leader CAN turn it to "inactive", but cannot turn it back to "active". Once the status reads "inactive" the only option the clan leader has then is to "kick" said member. This probably needs to be looked at, since I've never liked how this switch works.
All that being said, let me be specific here. What is happening with moonbus' status is that the icon is "sleeping" (with the ZZ's over its head). This is the status after a certain amount of time without moving occurs. Clan leaders cannot move the status back to active from here, either. I am guessing that this must be an automatic status change, and once the member makes a move, the status then shows correctly, whether "active " or "inactive". The problem is that, in the meantime, this member cannot be selected for challenges by other clan leaders.