Clickable buttons on pane border - MouseDown1Border not working?

[tony-sol]

I try to create clickable buttons on pane border, but it seems to me, that mouse_status_range always empty on MouseDown1Border

set-window-option -g pane-border-format "#{pane_id}:#{pane_index} #{pane_pid} #{pane_tty} #{pane_current_command} #[align=right]#[range=user|minimize] _ #[norange]#[range=user|maximize] O #[norange]#[range=user|close] X #[norange]"

# Experiments with this binding:
bind-key -Troot MouseDown1Border { display-message "|#{mouse_status_range}|" }

# Desired binding is similar to:
# bind-key -T root MouseDown1Border \
# if -F '#{==:#{mouse_status_range},maximize}' {
# 	resize-pane -Z
# } {
# 	if -F '#{==:#{mouse_status_range},close}' {
# 		kill-pane
# 	} {
# 		display -d0 '#{mouse_status_line} #{mouse_status_range}'
# 	}
# }

But wherever i click on pane's border, message is just ||.

Am i missing something important?

Also, click handler doesn't work on first pane in window, only on border click on second pane and further, so is there any options to handle click on the only one pane border?