Sims 4 is different on how the cheats work. You can activate the cheats, and they will stay on, unless...
Your sim (and you) leave the lot (loading screen) and go to another place. Then it will turn off when you go to a new location. I think this has something to do with Sims 3. In that game, when you turned on the testing cheats and left it on, it would cause the game to mess up, and the same for the move objects cheat.
Now with that said, there is the MCCC mod that will unlock a whole lot of cheats, including the debug cheats, and you don't have to keep turning them on. Here is a link to it.
https://deaderpool-mccc.com/#/Top
If you have any questions regarding this mod, they do have a very good (live chat) help system. Also keep in mind that in a couple of weeks that all Script Mods will be disabled, because of some huge patch that is going to happen. But with the person who does this mod is very good at keeping it updated.
