Re: My sim would sleep but suddenly she would wake up for no reason.
I have played for a long time. None of my many Sims have woken up apart from the usual reasons Noise, Toddlers bad dreams, (solved by reading them to sleep), children monsters (solved by spraying for monsters under the bed or using a nightlight (parenthood)) Children with the independent trait may talk to the monster and become confident no longer scared. Adult apart from noise may be woken by Toddlers/Children for the above reasons and by pets (they can be taught not to wake up Sims) In these cases the target sim will get out of the bed and stand waiting for them. If they are far away (say on another floor) it may time out and they start doing something else. By far the most common cause is noise sources in the bedroom or no door but an arch to an adjoining room with noise makers which are not limited to radios. This has nothing to do with ECO but has been like this forever.