Modifier double registers on fast rolls even though its a one shot modifier

[its-schmii]

I'm using a Keyboard with one shot modifiers / sticky shift etc.

So on a shift press the next keypress will be shifted. When karabiner is activated the keypress shifts / modifies two keys instead of one on fast typing / rolls.

Example: tap shift and then rolling over S and T produces ST instead of St. or tapping alt and rolling over two keys modifies both of them instead of only the first one.

As soon as karabiner is deactivated, everything works as intended. This has also been reported online by a reddit user (https://old.reddit.com/r/olkb/comments/svmgjc/one_shot_key_unintentionally_affecting_multiple/hxlc0fu/) but unfortunately no fix apart from deactivating Karabiner is mentioned.

Log of Karabiner event viewer when this occurs:

[
  {
    "type": "down",
    "name": {"key_code":"left_shift"},
    "usagePage": "7 (0x0007)",
    "usage": "225 (0x00e1)",
    "misc": "flags left_shift"
  },
  {
    "type": "down",
    "name": {"key_code":"s"},
    "usagePage": "7 (0x0007)",
    "usage": "22 (0x0016)",
    "misc": "flags left_shift"
  },
  {
    "type": "down",
    "name": {"key_code":"t"},
    "usagePage": "7 (0x0007)",
    "usage": "23 (0x0017)",
    "misc": "flags left_shift"
  },
  {
    "type": "up",
    "name": {"key_code":"left_shift"},
    "usagePage": "7 (0x0007)",
    "usage": "225 (0x00e1)",
    "misc": ""
  },
  {
    "type": "up",
    "name": {"key_code":"s"},
    "usagePage": "7 (0x0007)",
    "usage": "22 (0x0016)",
    "misc": ""
  },
  {
    "type": "up",
    "name": {"key_code":"t"},
    "usagePage": "7 (0x0007)",
    "usage": "23 (0x0017)",
    "misc": ""
  }
]

Is this a known issue, and/or is there a known fix for this behavior?

[andreaswilli]

I have the same issue on a ZSA Voyager configured to use OSM Shift using the Oryx configurator.

Is there any update on this or @its-schmii did you find a solution?

[its-schmii]

Unfortunately no fix for me except for using the karabiner sticky shift instead. Thats not really a fix though as it messes with other things. Same for sticky option.