textarea message x local page

[giselebrugger]

Hello,
I will describe the problem encountered when using the plugin
Moodle : Moodle 3.11.3+ (Build: 20211013)
Version local/pages: v1.9 (2021110400)
After more than 2 hours checking additional css to try to find the error i found out it was the pages plugin.

when I access the message page : http://localhost/moodle/message/index.php
the send messages text box has been resized

see
with plugin PAGES :

without plugin PAGES :

would there be any additional css that I could put in the field?
Thank you