listTableNames has different criteria for judging the regular matching of tables in the default namespace

There are the following tables under default: order_info, test123

When I execute the following logic (get the table that starts with test), test123 is returned

String tableNameRegex = "^(test).*";
TableName[] tns = admin.listTableNames(Pattern.compile(tableNameRegex));

When I execute the following logic (get a table that doesn't start with test), the return is order_info, test123

String tableNameRegex = "^(?!test).*";
TableName[] tns = admin.listTableNames(Pattern.compile(tableNameRegex));

As you can see, table test123 is returned both times.

When I look at the source code, I find that when I perform a regular match for the table in the default namespace, I perform one step more judgment, resulting in a table starting with test being returned both times.

boolean matched = pattern.matcher(tableName).matches();
if (!matched && htd.getTableName().getNamespaceAsString().equals(defaultNS)) {
    matched = pattern.matcher(defaultNS + TableName.NAMESPACE_DELIM + tableName).matches();
}

I think there are problems with this regular matching logic