White window when I close a OnlyOffice document with the Owncloud Web interface

[Philippe34]

Owncloud 10.9.1 + OnlyOffice app 7.3.3
OnlyOffice Document Server 7.0.0 on an another server
Owncloud Web app 5.2.0

Actually, I open docx, etc ..., inside owncloud with OnlyOffice.
I installed the new interface Owncloud Web and it works fine.
Now I'd like to open OnlyOffice doc in this interface.
I followed the instructions and it is good to open docx with OnlyOffice.

But when I want to come back to the files there is a bug

I have a white window:

The solution I found is to use the browser navigation arrow:
Going back

I can see again the document:

And the arrow to move forward:

I managed to get back to the files:

Do you have any advice for this bug ?
Thanks

[Philippe34]

Hi,
Am I alone on this github ?
Maybe this is the wrong place to report a problem