Had a look at my save files for Skyrim Remastered and I have put in over 65 hours thought it was a lot less,anyhow during all that play time I have only one CE error crash.
I am playing as a Nord and have used the flames,fast healing,clairvoyance and muffle spells without any problems.
Probably suggest rebuilding the PS4's database option 5 via the safe mode menu.
Failing the above try a delete and re-install of the game,if problems persist pop over to Bethesda's Skyrim forums it could be something to do with your character build and probably will need patching.
http://forums.bethsoft.com/forum/117-v-skyrim-skyrim-special-edition/
Also are using any mods? There's reports these can cause problems,personally I am not going to use any until I have finished the game.