DeliveryMap-Cannot read property 'length' of null

[RahimPasha]

Apparently, there is a little bug in DeliveryMap.js when markers is null at lines 21 and 40. It is not checking for null.
line 21: if (map.addedMarkers.length !== markers.length){
line 40: markers.forEach((marker, index) => {

So, I changed line 21 to:
if ((map.addedMarkers && markers) && (map.addedMarkers.length !== markers.length)) {
and added a condition for the else at line 39:
else if (markers) {
It works perfect now.

[lohithgn]

@RahimPasha you should create Pull Request of the fix. Somebody from the team will review and take it forward.