Nope. I bought it on 3rd May and so far there hasn't been any such issue i.e. heat or lag. But I ain't happy either for it cause samsung cut off so many essential features. If you are considering a new device A53 5G will be your best choice acc to me considering the fact that I have used A33 5G thoroughly.
Well first of all I learnt that phone temperature is highly dependent on surrounding temperature which is directly proportional.
Second in case of Samsung phones Any other processor >>> Exynos
Long usage of split screen or pop up view can also trigger increase in thermals.
If none of the above mentioned is related to your device I'd suggest to visit a Samsung store. A33 5G must be in warranty they will do a checkup for free right now.
You can try using Auto Optimize and Auto Restart feature from settings to increase your phone performance if it's getting throttled down when temperature rises.
My personal opinion - Since One UI 4 is pretty new and definitely under optimized you should wait for the next big update. Samsung optimizes it's devices without mentioning in the update details. I'm pretty sure they will fix it as I remember during One UI 3 everyone complaining of it's various issues but Samsung literally made it the best over time.
