Bug#942570: gnuplot: plot not updated with wxt/gtk3/gnome-shell/wayland

[di dit]

Package: gnuplot
Version: 5.2.7+dfsg1-6
Severity: normal

Dear Maintainer,

Since the rebuild with the wxWidgets GTK 3 package, the wxt terminal
updates only after the window is focused under gnome/wayland.
Here are steps to reproduce:

1/ start gnuplot
2/ set term wxt
3/ plot sin(x)
4/ plot cos(x)

After step 3, the sine curve is plotted in the wxt terminal.
After step 4, nothing happens. The cosine curve appears only after the
wxt window is focused.
This behavior manifest with gnome/wayland but not with gnome/xorg.
The qt and x11 terminal are not affected.
Everything was fine before the rebuild with the wxWidgets GTK 3
package.

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.2.0-3-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_FIRMWARE_WORKAROUND, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8),
LANGUAGE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnuplot depends on:
ii  gnuplot-qt [gnuplot-x11]  5.2.7+dfsg1-6

gnuplot recommends no packages.

Versions of packages gnuplot suggests:
pn  gnuplot-doc  <none>

-- no debconf information