In the April Security patch update , the performance of single core is enhanced but the Multicore performance is slightly down and right now it feels a heavy software right now and also the storage UFS2.2 is also downgraded. ( i don't believe antutu ...
Performance are very downgraded on this latest update and the antutu benchmark is crashing , that's a huge disappointed situation for me Here is the CPU and GPU benchmark
Our devices doesn't restart like this. If your restart mean it's automatic schedule power off then it's OK otherwise if the phone is heating and shut down then it's a serious hardware issue.