PICO D4 SoC heats with esp-mdf code

[ksnboopa]

I have designed my own PICO board using PICO D4 SoC with help of the document :
https://www.espressif.com/sites/default ... eet_en.pdf. Everything works perfectly fine except heat is produced when chip is using mesh functions. Mesh supposed to be connected always, otherwise I would have implemented sleep functions

I have tested with mesh functions for a week and no issues found (without plastic case covered) except heating issue. My plan is to put the same board behind wall switch and will have a plastic enclosure also. Only SoC chip gets heated no other components are impacted.

Is it safe to put behind wall switch?

Does heatsink on SoC would solve the problem?

Framework I use : MDF v1.0

Circuit : https://i.stack.imgur.com/AhNaI.png

Could someone help?