Cattleya hybrid with sunburnt or infected new growth

[mendoccino]

Hi,

My two-pseudobulb cattleya started a new growth but the new growth has a dark spot on it. I couldn't decide whether it is fungal infection or kind of a sunburn. Shall I leave it like that or try to remove it in order to try a second chance with another point of growth?

Suggestions are welcome.

A bit of history: I bought this plant as a four-bulb pot in last September. The smaller pseudobulb in the picture had a sheath with buds but they got all blasted in late October. In mid-December, I repotted the plant because the pot became smelly (root rot). While repotting, I saw that I had two two-pseudobulb plants and potted them separately in fresh medium. The other division started a new growth during winter and it has a large sheath now. I hope I'll be able to share its blooms when they decide to open.