I observed a strange error several times (reproducible): taking a current v11.1.18 productive installation, open a list view with > 500 records (e.g. error log). Mark all, then click Actions > Delete. The delete process actually goes nicely fast. Once it completes, the dialog disappears. The list view now tries to load again and freezes.
Browser: Firefox 66.0.2 (amd64)
Server: Debian 9 amd64
Opening ERPNext from another machine still works without any issues. But the browser tab will no recover (only copy URL into a new tab resolves the issue).
Any clues? Anyone with the same issue?