Sharepoint 2013 - Impossible to edit page

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SharePoint

SharePoint2013

Hello,

I have a problem with my SharePoint : i can not edit a page with the edit button. In a site, for edit a page i need to check out it and then click on edit button.

I've isolated a problem with a listview webpart :
- If i close it, the edit button is functional.
- If i replace the webpart with another listview webpart without changing anything : it's functional
- If i change the view of my new webpart (eg : add a column in the view) : i reproduce the issue

I do not reproduce this bug in another site.

Thanks for help.