I don’t know if this is really a bug or a compromise in the design needed to get it into 256 bytes of code space.

Always enter all four characters of 16 bit hex address when entering addresses into the ACI parser.  The parser doesn’t clear out preexisting addresses, so unless you enter all four address characters, you will use whatever was already present in memory mixed in with the new address.

EXAMPLE:  to load Hamarabi enter the following

004A.00FFR 0400.0FFFR