Description:
Okay, so I've been using LibreOffice for over a decade and I was a Microsoft Excel User Expert (and trainer) before that. I've extensively tested this issue, but I cannot figure out why it's happening. It has been happening through several updates but only over the last year or so. Before that, these workbooks I created and the related tables and charts worked fine for nearly 10 years. Here are the details.

I created a data table (named range on a separate sheet) and then I created a PivotTable from the named range on another sheet (the report, if you will). In addition to that, I created a graph that uses the PivotTable ranges as the Data Ranges for the graph. Initially, everything looks great.

Issue #1: After saving the document, the Charts are completely messed up. 
Issue #1.1 The data was appended to the Categories. Specifically, the categories were dates and were all listed first with no graph data, then the graph data was listed with blank categories. This happened to ALL the graphs in the sheet in exactly the same way. So I went back into the Data Ranges for the chart but they are all pointing to the correct data ranges with the correct data in them. Clicking OK after checking changes nothing. FIX: Reselect the exact same ranges and then click OK. Fixes the charts every time.

Issue #1.2: The Names of the Data Ranges are messed up. Specifically, the Names are from several cells concatenated to each other. For example, if the Name was supposed to be a person's name, say "Sam", the Name suddenly changes to "Sam Jane Date". This all seems arbitrary, but looks like it is the data from several adjacent cells. Again, checking the reference in Data Ranges shows that the reference is pointing only to one cell and the correct cell. Nothing has changed from when I originally input the reference. Again, clicking OK does nothing but reselecting the same exact reference and then clicking OK does fix the issue immediately.

Issue #2: The Filter on the PivotTable disappears. Specifically, whatever was selected in the Filter remains as the data in the cell but the drop down list goes away and the cell is just a normal cell. All the other drop down lists and related functionality disappear as well: Data cannot be clicked, etc. All the PivotTable formatting remains AND right clicking inside the table shows the PivotTable menu. However, if you go back to Properties and try to recreate the PivotTable, you get the warning that data exists and should you overwrite it? Clicking YES will replace the PivotTable but now with a completely unusable table (i.e., the PivotTable is now gone).

I cannot find the trigger for these errors. They have happened BEFORE I have closed the document and AFTER saving the document. They have happened AFTER reopening the document. I tried updating LibreOffice, closing the program completely, rebooting, and then creating a brand new document and completely recreating the document from scratch. After just a few minutes, the errors happened again.

Steps to Reproduce:
1. Create a named range on a sheet with multiple columns of data
2. Create a PivotTable on a separate sheet referencing the named range
3. Create a Chart based on the PivotTable
4. I cannot figure out whether the PivotTable needs to be Filtered, mine is.
5. I cannot figure out what triggers the error. After working with the workbook, adding additional sheets, saving, reopening, etc, the problems all occur. Some occurred immediately after saving the document and before I had even closed it.

Actual Results:
Already mentioned in the outline above

Expected Results:
Already mentioned in the outline above


Reproducible: Always


User Profile Reset: No

Additional Info:
Already mentioned in the outline above