[orca-list] crashes of MATE .18 apps clicking on About if orca is running

[Didier Spaier <didier slint fr>]

Hello,

I have orca 3.26 and mate 1.18.

When I click in the menu of many MATE apps like Atril, Engrampa,
Pluma, Mate System Monitor and others then on Help => About:
the app. crashes instantly with a segmentation fault if orca is running.

If instead I have no a11y parameter set and orca is not running, the
expected About window opens as expected.

To enable a11y I add to ~/.profile
this code snippet:
cut here
export SAL_USE_VCLPLUGIN="gtk"
export GTK_MODULES="gail:atk-bridge" # for GTK2
export GNOME_ACCESSIBILITY=1
export QT_ACCESSIBILITY=1 # for QT4
export QT_LINUX_ACCESSIBILITY_ALWAYS_ON=1 # for QT5
cut here

and orca is started by a desktop file in
~/.config/autostart

To disable a11y I remove the code snippet above and write Hidden=true in
the .desktop

Has anyone observed this behavior?

Do you need more information?

Incidentally, I see that even if orca is not started I have at-spi
running:
cut here
didier[~]$ ps -ef|grep at-spi
didier    4994     1  0 17:15 ?  00:00:00 /usr/libexec/at-spi-bus-launcher
didier    5013  4994  0 17:15 ?  00:00:00 /usr/bin/dbus-daemon 
--config-file=/usr/share/defaults/at-spi2/accessibility.conf --nofork --print-address 3
didier    5015     1  0 17:15 ?  00:00:00 /usr/libexec/at-spi2-registryd --use-gnome-session
cut here

I don't know why, but I presume that then the crash is not linked to
at-spi?

Any clue appreciated.

Greetings,

Didier