Status right separator not keeping background color

I am not requesting help with my configuration and believe something is genuinely broken.

[X] Something is really actually broken.

Is there an existing issue outlining your problem?

[X] I have searched the existing issues and they do not solve my problem.

Describe your problem.

While migrating my 0.3.0 config to latest, I ran into a specific issue that I haven't been able to figure out. When adding a symbol as a separator for the status on the right-hand side, the icon selected doesn't take the same background color as seen here (right side of the status modules is white - Yes, the weather module is not working right now but that's battle for another day 😅):

Paste your configuration.

# Sets the color to 256
set -g default-terminal "screen-256color"

set-option -g status-position top

# Changes the prefix from Ctrl+b to Ctrl+a since is easier
set -g prefix C-a
unbind C-b
bind-key C-a send-prefix

# Changes the commands to split the pages horizontally and vertically
unbind %
bind | split-window -h -c "#{pane_current_path}"

unbind '"'
bind - split-window -v -c "#{pane_current_path}"

# Allows to reload the Tmux config file with the r key
unbind r
bind r source-file ~/.config/tmux/tmux.conf

# Tmux pane modifications (resizing and maximizing)
bind -r j resize-pane -D 5
bind -r k resize-pane -U 5
bind -r l resize-pane -R 5
bind -r h resize-pane -L 5

bind -r m resize-pane -Z # Maximizes the selected pane

set -g mouse on

# Changes the starting index of the Tmux windows
set -g base-index 1
set -g pane-base-index 1
set-window-option -g pane-base-index 1
set-option -g renumber-windows on

############################### TPM Configuration #############################
# Tmux Plugin Manager (tpm)
set -g @plugin 'tmux-plugins/tpm'

# Plugin list
set -g @plugin 'christoomey/vim-tmux-navigator' # Allows the user of Vim keys to move between panes
set -g @plugin 'tmux-plugins/tmux-resurrect' # Persists TMux sessions after computer restart
set -g @plugin 'tmux-plugins/tmux-continuum' # Saves sessions every 15 minutes
set -g @plugin 'catppuccin/tmux' 
set -g @plugin 'xamut/tmux-weather'

# Weather plugin configuration
set -g @tmux-weather-location "Bogotá"
set -g @tmux-weather-format "%c%t"

# Session store configuration
set -g @resurrect-capture-pane-contents 'on' # Saves the state of the panes for restoration
set -g @continuum-save-interval '5'
set -g @continuum-restore 'on' # Restores on launch

#################### Theme customizations ####################
run ~/.config/tmux/plugins/tmux/catppuccin.tmux

#Theme selection and styling
set -g @catppuccin_flavor 'mocha'
set -g @catppuccin_window_status_style "rounded"
set -g @catppuccin_window_number_position "right"

set -g status-right-length 200
set -g status-left-length 100
# Default window styles
set -g @catppuccin_window_text "#W"
set -g @catppuccin_window_number_color "#{@thm_blue}"
set -g @catppuccin_window_text_color "#{@thm_mantle}"

# Active window styles
set -g @catppuccin_window_current_text "#W"
set -g @catppuccin_window_current_text_color "#{@thm_surface_1}"
set -g @catppuccin_window_current_number_color "#{@thm_peach}"

# Custom modules styles
set -g @catppuccin_user_icon " "
set -g @catppuccin_user_text " Sebastian "

set -g @catppuccin_session_text " #S "

set -g @catppuccin_status_right_separator " "
set -g @catppuccin_status_fill "icon"
set -g @catppuccin_status_connect_separator "no"
set -g @catppuccin_status_module_bg_color "#{@thm_mantle}"

# set -g @catppuccin_status_modules_right "weather user host session"

set -g status-left ""
set -g status-right "#{E:@catppuccin_status_weather}"
set -ag status-right "#{E:@catppuccin_status_user}"
set -ag status-right "#{E:@catppuccin_status_session}"

# Initializes the Tmux Plugin Manager
run '~/.tmux/plugins/tpm/tpm'

Attach screenshots.

No response

What tmux version are you seeing the issue on?

tmux 3.5a

Any additional comments?