Does internet gets disconnected when phone is in sleep mode ?

[mHappiee]

I often use WhatsApp web on my desktop. But for that I need to keep my phone on charging or keep the screen on. If screen is turned off and phone is not charging, I often get disconnected from WhatsApp web.

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How to solve this ?

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I am using Samsung A51

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[UPDATE, 2-Feb-2022]

It's because of Samsung Max. 

Turn off Battery Optimisation for Samsung Max.

[mHappiee]

Samsung ?

[Anonymous]

Oops 😬 samsung max

[mHappiee]

😂

[Ssharma905]

How to do settings when screen locked, mobile data will be automatically turn off in Samsung m33??