Problem with sequence number <seq>

[Alviunta]

Hello, I am using this library and everything seemed to be working fine at first when sending few packages.
But then when trying to send a large number of packets I started getting "Exception: CRC of Answer incorrect."
After some time of analysis and reading standards, I noticed that hexadecimal values ​​appeared in the sequence field. According to what is established in SIA-DC-09 the maximum value for this field is 9999 which makes me understand that hexadecimal values ​​should not be used here.
It is also indicated that for more information, section 7.1.5 of SIA-DC-07 should be reviewed, in which it indicates that the sequence number is a 4-byte field whose ASCII characters represent a 16-bit BCD value.
Is it possible that there is an error in the implementation?

An example:
"ADM-CID"0009R0L0#FFFF[#1111|1401 01 001] does not return an exception, works fine
"ADM-CID"000BR0L0#FFFF[#1111|1401 01 001] returns the mentioned exception

Thanks for your time.
Greetings