(41) HEPAX usage question

[Werner]

Suppose I saved a program "A" to HEPAX, and deleted it from program memory.
Program A is now part of CAT 2.
I then write a program "B" that calls this program.

LBL"B"
XEQ"A" -> XROM"A"
END

Naturally, the XEQ"A" is converted to XROM"A" when I enter the line in program memory.
But when I now save program B to HEPAX and delete it from program memory,
the XROM instruction in the HEPAX program has been converted back to XEQ"A".
Why, and is there a way to save the program file to HEPAX keeping the XROM?

(the XROM executes way faster, Or So I Think, that's why I want it)
(and yes, I'm aware of the dangers of HEPAX user XROMs. But I want it nonetheless)
(and no, I am not one of those incredibly lucky ones to own a functional 41 with HEPAX - but I do have the DM41X, which should act in exactly the same way).

Cheers, Werner