1. Open Arma 3 editor
2. place a player on the map
3. place Radio Alpha trigger on map ('Activation:' drop down and scroll to 'Radio Alpha')
4. in that triggers 'On Act:' field type '0 = execVM "myScript.sqf";'
5. save the mission (i.e. 'splendidCamTestMission')
6. Alt tab out of Arma
7. Open notepad or equivalent coding program
8. type a script that will be active for a good deal of time(i.e. 'while {true} do { a = 10;};')
9. save the script as 'myScript.sqf' in your mission file (i.e. C:/documents/Arma3/missions/splendidCamTestMission.altis)
10. Alt tab back into Arma 3
11. Click preview
12. Press 0-0-1 to activate the Radio Alpha trigger
13. Pause the game (escape)
14. Click on the 'camera' button below the console (below the big text box, second row of buttons)
15. mess around in splendid cam (not necessary)
16. press escape to exit splendid cam
17. if you are at time acceleration 0 then change it to another value (bottom bar in lower right corner)
18. Click either 'cancel' or 'ok' and observe the results as described in the description part of this bug report
19. Restart Arma3 (Either: Alt F4 or: control Alt Delete -> click task manager option -> click Arma 3 -> click end task button)
20. Open your mission back in the editor
21. Preview mission
22. open splendid cam without activating the trigger
23. Mess around in splendid cam (optional)
24. Exit splendid cam (clicking either 'cancel' or 'ok' will have their normal intended effect)