BTT Remote App Volumn Button Issue

Describe the bug
When keep pressing the volumn down button on phone to the mute state, BTT on computer can not sense volumn down button trigger anymore.

I think when I press volumn down button, the volume should keep stay at 1, but it didn't.
The volumn up button work fine.

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):
BTT Remote App running on iOS 12, iPhone X.


Device information:

  • Type of Mac: MacBook Pro 15" touchbar 2017
  • macOS version: 10.14 Mojave
  • BetterTouchTool version: 2.645
  • iOS version: 12.0.1
  • BTT Remote version: 4.8

I am having the same issue. If the volume on the iOS device running BTT Remote is at min/max, then I can no longer change the volume on the macOS device running bettertouchtool.