[cc65] optimizer bug !?

I will report because it discovered the phenomenon that seems to be
the bug of the optimizer.
(Please forgive dirty sentences because it is a machine translation...)

[ test.c ]
    long a;  // must be static life
    long b;  // must be static life

    void test(void)
    {
        a = 0x00112200;    // must be immediate pattern is (1stBYTE ==
4thBYTE)
        b = a;
        // b is 0x11112200 !
    }

[ command line ]
    cl65 -c -T -l -O test.c

[ part of test.lst ]
    000012r 1               ; b = a;
    000012r 1  AD rr rr         lda     _a+2
    000015r 1  85 rr            sta     sreg
    000017r 1  AE rr rr         ldx     _a+1
    00001Ar 1  AD rr rr         lda     _a
    00001Dr 1  8D rr rr         sta     _b
    000020r 1  8E rr rr         stx     _b+1
    000023r 1  A4 rr            ldy     sreg
    000025r 1  8C rr rr         sty     _b+2
    000028r 1  8C rr rr         sty     _b+3    ; lost 4th BYTE !

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