Hi All !!!
Just for the info not a diagnosis!!!!

I had a similar pattern on one of my plants after I didn't water it for a bit.
It was back in the corner and some how I neglected it. After it began to wilt
I realised what I had done and watered it immediately. The plant came out of it and is healthy again but it still bares the scares of the neglect.
It looks a lot like your pix in early stages.

Just info looks like one of mine.

GOOD LUCK :hippy: