some command can't accept numeric prefix and some easymotion command don't work

Describe the bug

command j & k can't accept numeric prefix, but command h & l work.
easymotion j/k doesn't work, other command ok.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'editor area'
2. Click on '5', status show '5'
3. click 'j', cursor down a line , '5' still in there
4. click '5' again,
5. show '55' ,
6. click 'k',
7. cursor up a line,
8. '55' still in there.

easymotion bug:

1. click '<leader><leader>' ,status show '<leader><leader>'
2. click 'j', '<leader><leader>' stil in there, cursor down a line, nothing hint.

Expected behavior
A clear and concise description of what you expected to happen.
j & k motion can't accept numeric prefix.

Screenshots
If applicable, add screenshots to help explain your problem.
If remapping-related, please attach log output: https://github.com/VSCodeVim/Vim#debugging-remappings.

Environment (please complete the following information):
installed vim, viml plugins
easymotion ture
doesn't config like
{
"key": "up",
"command": "cursorUp",
"when": "editorTextFocus && vim.active && !inDebugRepl && !suggestWidgetMultipleSuggestions && !suggestWidgetVisible"
}

• Extension (VsCodeVim) version: 1.17.1
• VSCode version: 1.50.1 (user setup)
• OS: Windows_NT x64 6.1.7601

Additional context
Add any other context about the problem here.

Reproduce the j/k numeric-prefix and easymotion failures in the VSCodeVim extension using the reported VS Code 1.50.1 and extension 1.17.1 environment, then trace the key-handling entry points for those commands. Done means numeric prefixes are consumed by j and k, and the easymotion leader sequence displays its expected hint.