Hexchat UI elements go black, reappear when scrolled

[sem]

I can't tell what is causing this problem, but the UI areas within Hexchat frequently glitch out, become black, and will become visible again if you scroll up/down within that UI element/window

Ubuntu 23.04
$ apt-cache policy hexchat
hexchat:
  Installed: 2.16.1-1build2
  Candidate: 2.16.1-1build2
  Version table:
 *** 2.16.1-1build2 500
        500 http://us.archive.ubuntu.com/ubuntu lunar/universe amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: hexchat 2.16.1-1build2
ProcVersionSignature: Ubuntu 6.2.0-23.23-generic 6.2.12
Uname: Linux 6.2.0-23-generic x86_64
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Jun 19 17:35:44 2023
InstallationDate: Installed on 2023-02-13 (126 days ago)
InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
SourcePackage: hexchat
UpgradeStatus: No upgrade log present (probably fresh install)

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better (also your numerous bug reports & recent QA too!)

Ubuntu 23.04 is approaching EOL rather soon, with notices of that fact already out (https://fridge.ubuntu.com/2023/12/15/ubuntu-23-04-lunar-lobster-reaches-end-of-life-on-january-25-2024/), so I suspect it'll be unlikely anyone will look at this. Testing for it on the development release maybe worthwhile, alas GTK2 & Wayland ....

( that app is very old & one of the few remaining GTK2 apps. I use hexchat myself, and haven't noticed this behavior (though I believe I have seen it before); I'm mostly running noble or the development release, and probably most critical Xorg (LXQt or Xfce most often) )