Unlike Wilson who uses his full known name for the epilogue of Adventure Mode (Wilson P. Higgsbury), Wagstaff and Wheeler do not despite their full names being known (which are Robert Wagstaff and Maybelle Dorothea Wheeler respectively). This should just require the change of their character names in strings.lua, so it shouldn't be a hard thing to correct at all.
Steps to Reproduce
1. See above.
This issue has not been confirmed by a developer yet.