Initial line at edge - meaning?

What is the meaning of the short line laid down by the A1 Mini at the edge of the plate, before the print starts? Can anything be deduced from it? It has started to look terrible after switching from Sunlu Matte PLA to Sunlu High Speed PETG but the actual print is just fine. I often get stringing from his malformed line to the model but not afterwards, during the print. I don’t print this PETG at high speed but at 100mm/s and 235°C (looks a bit cleaner and more matte).