Which version of MadMapper ? Are you on Windows or macOS ?
We updated to latest EDSDK (cannon sdk) in MadMapper 3.6.2 if I'm not wrong. If the problem happens with latest release, please send a log file: click in MadMapper Tools menu with Cmd key down (Ctrl key on Window), choose "Enable log...", restart MadMapper, reproduce the issue and in MadMapper tools menu, choose "Send current log...". Let me know when it's done I'll check your log file.