Encoding issue with proxy sources

[jp1]

I have a proxy source that is a subfolder that reads like this:

P5%2FP4

but it gives this result in the source renderizer:

P5/P4

In the original it's still:

P5%2FP4

Is there any way to get ZP checker to recognize this? To get %2F to stay as is and not change to a /. Cheers