Issue with wallpaper changing while hovering over names in Rofi — where am I going wrong?

I’ve written a script to change my wallpaper with Rofi, but I’m having a problem. While I hover over the wallpaper names in the rofi menu, the wallpaper is not changing dynamically for like a temporary preview (as I expect). By the way, I want the wallpaper to only change after I select the one I want and not during browsing. Here's the script I’m using:

#!/bin/bash

WALLPAPER_DIR="$HOME/Pictures/Wallpapers"

# Function to format wallpaper names for display
format_name() {
    basename "$1" | sed -E 's/[0-9]+[kK]?[- ]?[0-9]*[a-z]*//g; s/-/ /g; s/\.(jpg|png|jpeg)$//I; s/\b([a-z])/\u\1/g; s/\s+/ /g; s/^\s+|\s+$//g'
}

# Get list of wallpapers and format them
mapfile -t wallpapers < <(find "$WALLPAPER_DIR" -type f \( -iname "*.jpg" -o -iname "*.png" -o -iname "*.jpeg" \))
formatted_names=()

for wp in "${wallpapers[@]}"; do
    formatted_names+=("$(format_name "$wp")")
done

# Store current wallpaper
current_wallpaper=$(grep 'feh --bg-scale' ~/.fehbg | cut -d "'" -f2)

# Let rofi show and capture the selection live
selection=$(printf "%s\n" "${formatted_names[@]}" | rofi -dmenu -i -p "Select Wallpaper" -format "s" -monitor-changes | while read -r selected_name; do
    for wp in "${wallpapers[@]}"; do
        if [ "$(format_name "$wp")" == "$selected_name" ]; then
            # Change wallpaper temporarily as user browses
            feh --bg-scale "$wp"
            break
        fi
    done
done)

# Revert to previous wallpaper if no final selection
if [ -z "$selection" ]; then
    [ -n "$current_wallpaper" ] && feh --bg-scale "$current_wallpaper"
fi

I’ve tried some solutions, but I’m not sure where I’m going wrong. Is there a simple way to the wallpaper from changing on temporary basis until I make a final selection? Any guidance would be appreciated... Oh I am using Arch (btw). :v