Variable doesn't work at multiple devices

[2e3s]

Version 1.5.0 I use the following example: https://github.com/sezanzeb/input-remapper/blob/main/readme/examples.md#combinations-spanning-multiple-devices The intended result is the mouse side button raises volume without keyboard modifiers, and mutes with CTRL.

Mouse side buttons work with this config without a modifier well, however, the designated (back) mouse button doesn't do anything with CTRL as if the condition is always false.

I tried to remap Control_R to XF86AudioMute and it works (so the remapping works for the device). Control_L also continue work normally.