I don't think the information provided in the 'production numbers' tweet supports that conclusion yet. It is equally possible that the first 2,365 MIC Model 3s produced in Feb used Panasonic cells, until such time as LG product was able that meets Tesla's specifications. Then (once LG was able to supply approved cells), the remaining 1,559 cars produced in Feb used locally sourced LG Chem cells.
Neither of potential interpretations is supported by the available data. The best answer is, 'we don't know yet'.
Cheers!
Unlikely. The same LG/Panasonic ratio existed in January, too.