Boeing said that the 737 MAX passenger plane has a software fault that causes an indicator light to light up at the wrong time: “We are incorporating a change to the 737 MAX software prior to the fleet returning to service to ensure that this indicator light only illuminates as intended,” the company said on Thursday.
https://www.neweurope.eu/article/boeing-finds-new-software-flaw-on-grounded-737-max-jet/