Filtered Sum Bug?

Looks like another Calc bug:

In A1:A5 enter Test, 1, 2, 3, 4 and Autofilter it.

In cell A5 enter formula: =SUBTOTAL(109,A2:A5)

Click the Filter dropdown arrow and notice the subtotal is now part of the filtered rows. Is that expected?

Select Column A and clear the filter then reapply to Cells A1:A5. Click elsewhere then click the dropdown. Cell A6 is back in the filter. Even if a blank row is left above the subtotal it is included.

…Autofilter for what value?

Please upload your ODF type sample file here.

SUBTOTAL ignores itself as well as rows hidden by filtering, but the filtering tool does not ignore any values.