Progress and remaining time on touchscreen not correct

Hi guys,
yesterday I’ve printed one item that requires about 4h to be done (Luban)… on the touchscreen of my A150 the progress circle and the remaining time to finish was not correct during all the process: it started reporting the correct time but it not keep aligned during the entire process, for example after about 3h it shown that the remaining time was still about 2h… when the process reach about 90/95% it start showing the correct remaining time.

Can you please fix it?