Pluma spams xsessions with gtk critical

[duck7000]

Expected behaviour

No errors/warnings in xsession
Actual behaviour

There are multiple entrys of the same error/warning

Steps to reproduce the behaviour
start caja
open xsession with pluma
Those errors/warnings are displayed multiple times (spammed)
Gtk-CRITICAL **: 22:31:01.127: _gtk_css_image_get_concrete_size: assertion 'default_width > 0' failed

Gtk-CRITICAL **: 22:31:01.127: _gtk_css_image_get_surface: assertion 'surface_height > 0' failed

MATE general version
1.26.2

Glibc version 2.38-7

Package version
1.27

Linux Distribution
Manjaro mate

Link to bugreport of your Distribution (requirement)
Why would i do that, it is not a package problem as far as i can see?