System?
Mods?
Use the UESP link in my Signature to see if the issue You are having is a known problem if You are on a console.
I have save-on-travel turned off and my .ess file is on 5557KB. I can exit the temple by going back out the front no problem. The only mods I can think that might effect the area are: Realistic Lighting Overhaul 4.0.6 and Relighting Skyrim (no scripts) 3.3a, but I've had no issues anywhere else. I've run TES and it finds no errors with my installed mods. Game is current Steam version with all four DLCs.