Why does my subconscious keep replaying the same mundane grocery store checkout line every night?

Lately, I’ve been obsessed with my dream journal, mostly because I’m confused as hell. For the past week, I haven't been flying or fighting monsters; instead, I’m stuck in a loop of being at a grocery store checkout, trying to find my wallet while the cashier stares at me with total indifference. It’s not a nightmare, but it’s incredibly tedious and feels strangely draining when I wake up. As someone who tracks my REM cycles to maximize recovery, this feels like a waste of processing power. Is my brain just cleaning out junk files, or am I missing some deeper symbolic stressor hidden in these mundane tasks? Does anyone else have recurring dreams that aren't exciting but just feel like an extension of their daily work? I’m genuinely curious if there’s a way to influence these plots or if I’m doomed to stand in this imaginary checkout line forever.