Anyone know why the float property doesn't work with regex here but works with full name?

[rasibn]

Anyone know why the float property doesn't work with regex here but works with full name?

Image 1 (Doesn't Work)

bind = $mainMod CTRL, V, exec, pypr toggle volume
$volume_sidemenu = ^(pavucontrol)$
windowrule = float, $volume_sidemenu 

Image 2 (Works)

bind = $mainMod CTRL, V, exec, pypr toggle volume
$volume_sidemenu = ^(pavucontrol)$
windowrule = float, org.pulseaudio.pavucontrol