Checklist

• I have read the appropriate section in the contributing
  guidelines
• I believe this issue is a problem with polybar itself and not a misconfiguration on my part.
• I have searched for other open and closed issues that
  may have already reported this problem.
• I have checked the known issues page for this problem.

Describe the bug

I was using i3bar and switched recently to using polybar with https://github.com/adi1090x/polybar-themes. I am using Fcitx and icon which was showing in i3bar does not work in polybar.

Expected behavior:

Fcitx icon appears in tray.

Actual behavior:

Fcitx icon does not appears in tray.

Was it working before? No

• Did you also experience this bug in an earlier version of polybar (yes/no/don't know)? don't know
• If no, what was the last version where this worked correctly?

To Reproduce

fcitx -D
polybar -q main -c "config.ini" &

Config here (not much changed from polybar-themes): https://www.file.io/download/JuebKvAGYCH9

Polybar Log

error: Failed to query _XEMBED_INFO, removing client... (Invalid _XEMBED_INFO for window 0x1400706)

Environment:

• WM: i3
• Distro: Arch linux
• Output of polybar -vvv:

polybar 3.5.6

Features: +alsa +curl +i3 +mpd +network(libnl) +pulseaudio +xkeyboard

X extensions: +randr (+monitors) +composite +xkb +xrm +xcursor

Build type: Release
Compiler: /usr/bin/c++
Compiler flags: -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions         -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security         -fstack-clash-protection -fcf-protection -Wp,-D_GLIBCXX_ASSERTIONS -Wall -Wextra -Wpedantic -O3 -DNDEBUG
Linker flags: -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now