Better Snap Tool sends Numlock to Parallels VM running Windows 7 when holding left mouse down

Describe the bug

Better Snap Tool V 1.9

In the VM Windows 7 I see two cursors when click the left mouse and hold for about 1 sec. There's a offset of 1 inch between these two cursors. Strange behavior. Following this with a right click will return to a single cursor, but now cursor shifts randomly a few inches. Note a Click then holding is common gesture to enter a "panning mode" to move an object to a new location.

When this occurs the left click is sent followed by a repeated series on NUMLOCK key codes as the left mouse button is held down

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):

On a common Mouse Left Click and hold, I've seen the identical behavior on 2 different mice, different brands and drivers. Same odd behavior

If applicable, add screenshots to help explain your problem. (You can just paste or drag them here)

Device information:

  • Type of Mac: Macbook 2012
  • macOS version: Mojave 10.14.4
  • BetterTouchTool version: Latest

Additional information (e.g. StackTraces, related issues, screenshots, workarounds, etc.):
Quit BST V1.9 and the strange behavior is gone.
Note: Before bug reporting, please make sure you have the latest version of BetterTouchTool and that you have already tried to restart your system :-). If you encounter a crash, please attach a crash log from the macOS from the "User Diagnostic Reports" section.

No crash occurs