[Bug]: mouse click has no effect after switching between android apps via alt-tab

[Digit-al]

Problem description

When I leave termux-x11 for another android app through keyboard alt-tab combination on mi Redmi Pad Pro tablet, once I go back to Termux-X11, all seems to be working but the mouse clicks have no effect.
When I leave termux-X11 through gestures (rather than alt-tab), all keep working when returning to termux-X11.

What steps will reproduce the bug?

install proot-distro ubuntu + xfce4
start xfce4 from termux using the script below:

#!/data/data/com.termux/files/usr/bin/bash

# Kill open X11 processes
kill -9 $(pgrep -f "termux.x11") 2>/dev/null

# Enable PulseAudio over Network
pulseaudio --start --load="module-native-protocol-tcp auth-ip-acl=127.0.0.1 auth-anonymous=1" --exit-idle-time=-1

# Prepare termux-x11 session
#export XDG_RUNTIME_DIR=${TMPDIR}
export DISPLAY=:0
termux-x11 :0 &

# Wait a bit until termux-x11 gets started.
sleep 3

# Launch Termux X11 main activity
am start --user 0 -n com.termux.x11/com.termux.x11.MainActivity
sleep 1

# Login in PRoot Environment. Do some initialization for PulseAudio, /tmp directory
# and run KDE as user droidmaster.
# See also: https://github.com/termux/proot-distro
# Argument -- acts as terminator of proot-distro login options processing.
# All arguments behind it would not be treated as options of PRoot Distro.
proot-distro login ubuntu --shared-tmp -- /bin/bash -c  'export PULSE_SERVER=127.0.0.1 && export DISPLAY=:0 && export GALIUM_DRIVER=virpipe && export BROWSER=firefox && dbus-launch -
-exit-with-session startxfce4'

exit 0

Switch to other android apps through alt-tab

return to termux-X11

Try to open a menu or an app -> no effect when you click

What is the expected behavior?

click should still have effects when returning to the termux-X11 app

[twaik]

Did you try pressing "alt" one more time? Probably it is stuck in pressed state after window change.

[Digit-al]

Hi twaik,
Thanks for taking time to answer.
You are absolutely right, if I press alt again, everything works again as expected!
Thanks again
David

[nathaneltitane]

came to add a bug - found this! amazing thanks @twaik - is it an android 'feature'?