A DESCRIPTION OF THE PROBLEM :
https://docs.oracle.com/en/java/javase/21/docs/specs/serialization/protocol.html#terminal-symbols-and-constants

In the example it shows:

The resulting stream contains:

    00: ac ed 00 05 73 72 00 04 4c 69 73 74 69 c8 8a 15 >....sr..Listi...<
    10: 40 16 ae 68 02 00 02 49 00 05 76 61 6c 75 65 4c >Z......I..valueL<
    20: 00 04 6e 65 78 74 74 00 06 4c 4c 69 73 74 3b 78 >..nextt..LList;x<
    30: 70 00 00 00 11 73 71 00 7e 00 00 00 00 00 13 70 >p....sq.~......p<
    40: 71 00 7e 00 03 >q.~..<

However, it should be:

The resulting stream contains:

    00: ac ed 00 05 73 72 00 04 4c 69 73 74 69 c8 8a 15 >....sr..Listi...<
    10: 40 16 ae 68 02 00 02 49 00 05 76 61 6c 75 65 4c >@..h...I..valueL<
    20: 00 04 6e 65 78 74 74 00 06 4c 4c 69 73 74 3b 78 >..nextt..LList;x<
    30: 70 00 00 00 11 73 71 00 7e 00 00 00 00 00 13 70 >p....sq.~......p<
    40: 71 00 7e 00 03 >q.~..<


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Visit https://docs.oracle.com/en/java/javase/21/docs/specs/serialization/protocol.html#terminal-symbols-and-constants and go to the "Example" Hex/Ascii displayed

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
    00: ac ed 00 05 73 72 00 04 4c 69 73 74 69 c8 8a 15 >....sr..Listi...<
    10: 40 16 ae 68 02 00 02 49 00 05 76 61 6c 75 65 4c >@..h...I..valueL<
    20: 00 04 6e 65 78 74 74 00 06 4c 4c 69 73 74 3b 78 >..nextt..LList;x<
    30: 70 00 00 00 11 73 71 00 7e 00 00 00 00 00 13 70 >p....sq.~......p<
    40: 71 00 7e 00 03 >q.~..<

ACTUAL -
    00: ac ed 00 05 73 72 00 04 4c 69 73 74 69 c8 8a 15 >....sr..Listi...<
    10: 40 16 ae 68 02 00 02 49 00 05 76 61 6c 75 65 4c >Z......I..valueL<
    20: 00 04 6e 65 78 74 74 00 06 4c 4c 69 73 74 3b 78 >..nextt..LList;x<
    30: 70 00 00 00 11 73 71 00 7e 00 00 00 00 00 13 70 >p....sq.~......p<
    40: 71 00 7e 00 03 >q.~..<


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FREQUENCY : always