In single player Combat Ops Everon, saves do not allow to continue from a previous session.
This is contrary to the change log for 1.1.0.42 which states that this should work. The change log reads:
"Fixed: Combat Ops Save and Load not working properly"
Play single player Combat Ops Everon, make some progress, then leave the game. If you then want to enter the game again with Continue, you are back starting from scratch.
The forums have plenty of requests for this to work:
https://forums.bohemia.net/forums/topic/283810-combat-ops-everon-sp-does-not-save-progress/
https://forums.bohemia.net/forums/topic/283765-combat-ops-everon-broken/
Reddit:
https://www.reddit.com/r/ArmaReforger/comments/1becu6o/combat_ops_really_doesnt_save_progress/
Youtube showcases the problem as well: https://youtu.be/Pn2yIqfOiog?t=1145
This bug causes single player Combat Ops Everon to be far less interesting and thereby removes a large portion of potential gaming hours among the community and Reforger supporters.