There may be a bug in patch 8 in the "Practice Missions" clipboard command. Simply put, there may be an undocumented unenforced rule that the .mis / .res file names must not exceed 23 bytes.
Missions and flights within the mission "st_samurai_training.res" will display properly in the mission list when you click the command above. Rename and re-deploy the exact same mission as "sta_samurai_training.res" and the "Practice Missions" command causes Aces High to lock up with a white screen, an error message, and a memory dump.
There appears to be a string length maximum that's being violated. The clipboard is truncating and choking on it and/or the Mission Editor is not enforcing the maximum length at design and build time. Clear as mud?
-Sudz- and company, does this check out?
Stalwart