-
Further supporting the suggestion to update Q, this blog post might be of interest to you. Specifically the ANYMAP feature that was added in v3.6.
“The anymap structure within the files provides a format which is mappable, as opposed to previously unmappable non-fixed-width records”. Strings are a non-fixed-width records which would explain the values in mmap you’re experiencing. Further reading on this can be found in the release notes