switch-apps Alt+Tab leaks Alt key

[schiorean]

Describe the bug
When [switch-apps] is enabled, the Alt+Tab leaks Alt key to the app that is swiched in the background. This is visible in apps that have an editor, like Notepad++ / PHPStorm that I both use.

To Reproduce

1. Have 2 apps, Notepad++ and another one
2. Edit in Notepad++
3. Alt+Tab to switch the other app
4. Note that the editor in np++ lost focus and now menu focused (because of Alt)
5. Alt+Tab to switch back to np++
6. The first keypress is lost because focus is not in the editor view anymore, but in menu.

Expected behavior
Alt+tab back and forth should keep the focus of the app exactly where was it.

Configuration

# Whether to show trayicon, yes/no
trayicon = yes

[switch-windows]

# Hotkey to switch windows
hotkey = alt+`

# List of hotkey conflict apps
# e.g. game1.exe,game2.exe
blacklist =

# Ignore minimal windows
ignore_minimal = no

# Switch to windows from only the current virtual desktops instead of all desktops.
# Defaults to match the Alt-Tab behavior of Windows:
# Settings > System > Multitasking > Virtual Desktops
only_current_desktop = auto

[switch-apps]

# Whether to enable switching apps
enable = yes

# Hotkey to switch apps
hotkey = alt+tab

# Ignore minimal windows
ignore_minimal = yes

# List of override icons, syntax: app1.exe=icon1.ico,app2.exe=icon2.png.
# The icon path can be a full path or a relative path to the app's directory.
# The icon format can be ico or png.
override_icons =

# Switch to apps from only the current virtual desktops instead of all desktops.
# Defaults to match the Alt-Tab behavior of Windows:
# Settings > System > Multitasking > Virtual Desktops
only_current_desktop = auto

[log]

# Log level can be one of off,error,warn,info,debug,trace.
level = info

# Log file path.
# e.g.
#   window-switcher.log (located in the same directory as window-switcher.exe)
#   C:\Users\sigod\AppData\Local\Temp\window-switcher.log (or used the full path)
path =

Log
No logs.

Screenshots/Media
No screenshots.