About the display of text at startup in CODE

I have updated from loolwsd to coolwsd 21.11.0.5. Then, just before the contents of the document are displayed, “Documet Name” is momentarily displayed in the upper left corner.

Is this a normal state? Or is there some mistake in the setup?


CentOS 7.8, PHP 8.0.13, Nginx 1.20.1, Collabora Office 21.06.9.1