Dublicate rule and digits ?d

[AlexS]

Hello!
I use hashcat v6.2.6
In the command

Code:

mp64.exe ?d?d?d?d | hashcat  --stdout  -r dummy_digits.rule

where dummy_digits.rule  contain only d rule
output generated with unknown symbols and disordered

Code:

99659967 99669967 9967996? 99689969 99699979 99709971 99719973 99729973 99739977 99749975 99759977 99769977 9977997? 99789979 997999?9 99809981 99819983 99829983 99839987 99849985 99859987

The problem starts from three digits in mask (?d?d?d)