This needs to be confirmed by a dev:
If you truly believe it’s a problem with the game you could try this: Not sure if you’ll be able to run Tower Unite? Try this UE4 performance tester and tell us if there are any major differences in temps (remember to increase quality with “]” button) (maybe it will show us if there are any problems with your game config)
On TU I have around 74°C and in the test I have around 68°C so keep in mind the results won’t be the same.