VSCodeVim intermittently inserts period when pressing space bar in insert mode

Describe the bug
I've been using VSCodeVim on my Mac for years, but lately, it intermittently inserts a period when I press the space bar twice (on a new line starting from the left margin). In other words, it inserts a period (full stop) in column 2 on that line.

If I keep tapping the space bar, it inserts normal spaces for the remainder of the line.

Interestingly, if I press and hold the spacebar, a period isn't inserted in the second column.

To Reproduce
Steps to reproduce the behavior:

1. Press 'ESC`
2. Press i to enter insert mode.
3. Tap the space bar twice. On the second tap, it intermittently leaves a period character.

Expected behavior
I should be able to insert two spaces on a line and not see a period character in the second column (position).

Screenshots

Environment (please complete the following information):

• Extension (VsCodeVim) version: v1.27.3
• VSCode version: Version: 1.92.0 (Universal)
• OS: Sonoma 14.6

Additional context
I have tried different keyboards and they don't solve this issue. When I turn off VSCodeVim, the problem goes away.

Start by reproducing the issue in VSCodeVim v1.27.3 with VS Code 1.92.0 on macOS Sonoma, following the listed Esc, insert-mode, and double-space steps. Compare the behavior with VSCodeVim disabled; done means tapping the space bar twice in insert mode consistently produces two spaces without a period.