Why does the remote start stop working after a while

Question

So I install the EVO ALL SN: 001A07 196424 in my Hyundai Sonata Sport Key To Start and it works perfectly when it needs to. After like letting it set for a about 30 mins or so, I noticed it doesn't react to me pushing the lock button 3times. The only way for it to actually work I need to like turn the engine on as like a "hey wake up". After turning the engine off for about again 10 to 20 mins, you can still remote start it but it's like after a certain about of  time passed, it wouldn't "wake up". I don't know what to do and at this point if nothing can be done, I don't want it!