'Reload Tag' overwriting rekordbox relevant tags

I was testing the 'Reload Tag' function and was surprised that it does also wipe rekordbox relevant information like 'Remixer'.

AFAIK, Remixer is no standard ID3 field, so why is this bothered at all? Is this behavior intended?

Steps to reproduce:

1) Edit information for a M4A track

2) Enter some Remixer

3) Close information editor

4) Reload Tag for this particular track

Result: Remixer field is empty again.