Whatsapp Closing After A While Of Screen Locked

[Luis.cb]

I having issues with whatsapp since i updated to xiaomi.eu rom (last stable rom), i have whatsapp with "MIUI performance" "Autostart on", after a while when i lock the phone the Whatsapp process change to "Cache process" and finally gets completely closed, is there anyway to fix this?

I flashed the rom with twrp and correct wipes

Thanks all!

Edit: I tried performing wipes, changing app settings to "No restrictions", and Priority on notifications, and the problem persist, even with the Blue lock on recent apps whatsapp gets closed,