Oh, I remembered my problem. Hiew was confusing absolute and relative offesets.
When enter an edit mode (F3) hiew switches to absolute offset mode, and there were some mistakes either in absolute mode or in noramal one.
It's really not that you are talking about.

I just checked your example in hiew 6.86b on WinHex. I replaced code at offset .00479DC6 with yours and I was shown right result ("call 39052BE4"), but in hiew 7.01a it was "call 038C44BE4". It seems strange Something goes wrong from between 6.86b and 6.86h

Well, you may e-mail SEN (hiew's author) this issue, but I don't know whether he cheks his mailbox (you can find e-mail address is in hiew_en.txt file)
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Maybe it's because of out-of-range address. For example, hiew 6.85 does not change call address to relative offset regardless of current view mode (Global/Local) if it's out of file. But it seems strange that 6.82 is bad, 6.86 is ok, and 7.01 is bad again