Multipart form data post fails with latin2 chars.

If I remove last three characters it works.
https://github.com/matejonnet/undertow/commit/7c874805f96d3cc0204dbde75d3e023a6e89ee4e#L2R71

Is it expected behaviour that url decode is required?
https://github.com/matejonnet/undertow/commit/7c874805f96d3cc0204dbde75d3e023a6e89ee4e#L2R77