https://issues.apache.org/ooo/show_bug.cgi?id=117508 Trying to open a file as CSV where content starts with ID;P or ID;N or ID;E fails as the filter detection overrides with SYLK format because of the (weak 4 characters) signature. Bug sample was ID;NAME
Eike Rathke committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=0de1b33bf73f075cff12fbe288129b2afff8216d resolved fdo#48347 do not override preselected CSV with SYLK detection