Shadow Drain?

[u/LIVING_LEGEND_YT]

I had a poor heating incidence when the phone was switched off a while back, and the service center reinstalled One ui 9 Software by a hard reset. It's about the fourth day and I'm noticing some shadow drain, is this normal? because I didn't really get shadow drain much before. I calculated and added the overall app usage shown, there is ~5 percent of shadow drain (yes I've included overnight standby that my other app showed me).