GTK error when starting with --role option

Version info:
IM - Vi IMproved 8.1 (2018 May 18, compiled Feb 01 2022 09:16:32)
Included patches: 1-2269, 3612, 3625, 3669, 3741
Modified by team+vim@tracker.debian.org
Compiled by team+vim@tracker.debian.org
Huge version with GTK3 GUI.

on ubuntu 20.04, i3 window manager.

When starting gvim from a terminal as follows:
gvim --role="helpscreen"
I get the following message:
(gvim:10303): Gtk-CRITICAL **: 13:50:30.814:
gtk_distribute_natural_allocation: assertion 'extra_space >= 0' failed
The message repeats whenever I mouse over.

It appears that the message is triggered when I use the role option.

Any ideas about what may be causing this and how to suppress the message?
thanks

--
Tim (RIP Sven)
tj49.com

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