Inconsistent results on DCA Vantage

Jumping in to share our hospital just reported issues to Siemens with A1c cartridges lot 0581.  Similar to other posts, we have four DCA Vantage analyzers across two clinical sites with random erroneously low values.  Repeats have been closer to expected values.  We are seeing this on random patients (6 so far with clear documentation) and also QC levels.  QC is passing (when repeated if needed), calibration is up to date, and maintenance is up to date.  We have run comparison studies among these analyzers and our two we have in our POCT Lab in the Main Hospital - all passed and no issues identified.  These erroneous results have also occurred across multiple operators, some of them very experienced and SuperUsers of the device, so collection issues are not suspected.  The only commonality is the cartridge lot.  We just opened the ticket with Siemens, but I will update accordingly if any meaningful information is obtained.  I was told when I opened the ticket that there are no issues identified with any A1c cartridge lots as of yesterday (10/7/26).