Distance detection by pool simming

Hello,

for pool swimming, the distance detection is very poor. The reason is that every time you change the position in a lane, it is already assumed that the lane has ended. Therefore, it comes to incorrect distance information.
It can be assumed that in a 50m pool the lane is not already completed after 30 seconds.
It would be desirable to be able to specify a time in which no new lane would be counted. So everyone could individually enter his best time and before this time the change of the lag would not already lead to a counting of a new lane.