Gtk-CRITICAL on Gajim launch and infinite stream of Gtk-WARNING's since the activity feed was added

Starting with commit ee50297d I get the following line when starting Gajim:

(launch.py:6159): Gtk-CRITICAL **: 23:06:54.750: gtk_grid_attach: assertion 'width > 0' failed

And then he following line gets infinitely printed, about 20 times per second:

(launch.py:6159): Gtk-WARNING **: 23:06:57.148: Trying to measure GtkPopoverMenuBar 0x55cf5e1906e0 for width of 261, but it needs at least 267

And if I'm composing a multiline message, these warnings stop being printed

Versions:

• Gajim: newer than ee50297d
• GTK Version: 4.18.2
• GLib Version: 2.84.0
• Pango Version: 1.56.3
• PyGObject Version: 3.50.0
• cairo Version: 1.18.4
• pycairo Version: 1.27.0
• python-nbxmpp Version: 6.1.1
• libsoup Version: 3.4.2

In case it's relevant, my screen resolution is 1366x768 and Gajim is used in (almost) full-screen.

Note: feel free to close this issue if you deem it unimportant.