Defect: Right numshift breaks left shift

[Raymo111]

Describe the bug
When right numshift is released while left shift is held down, left shift is disengaged.

To Reproduce
Steps to reproduce the behavior:

1. Hold down left shift
2. Hold down right numshift
3. Release right numshift

Expected behavior
Left shift should still be held down at this point, but as soon as right numshift is released, left shift is disengaged even though the physical switch is still held down.

Please complete the following information:

• OS: Linux 6.10.4-arch2-1 x86_64 GNU/Linux
• CharaChorder Device: CC1 M0, CC1 S3
• CCOS Version: 1.9.10 beta, 1.9.9 beta

Additional context
Similar, possibly related to #93