Help! New growths on Cymbidium attacked.

[Rain-or-Shine]

I was lucky enough to purchase this Cymbidium "Dural Gold" about a month ago. All had been well and I had been keeping a close eye on it, however when I was soaking it this morning I noticed that something had been attacking one of the new growths on the back of the plant!

Does anyone have any ideas what it could be and how I could treat it? I can't see any visible insects, however it's such a large orchid that they could be hiding anywhere.

I have a new pot lined up to repot it, however I want to make sure that I can treat whatever this is before then.

Please help, I absolutely adore this orchid and want to do whatever I can to help it