People often wait until spring to repot, but there are a few things that would warrant action immediately, such as a decaying potting medium or any sort of rot. Check the roots and the state of the medium-- if they look healthy and the plant is not in decline, your best bet is to wait a few more months.
Repotting while the orchid is in spike often, but not always, disrupts the flowering, but it's worth the sacrifice if the survival of the plant is in question. Not sure about keikis. However, even well-timed repotting usually results in a short period of shock, so it's a good idea to do it when the plant is putting out active, healthy root growth. Good luck!
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