Map widget markers disappearing

I put two markers on the map widget, with index 0 and index 1.
After updating the location of index 0 for a while, the marker for index 1 disappears from the map. I can only see one marker.
Is there a limited buffer length for map locations where locations are purged, even if map coordinates are posted for a different index?

code blocks for location 0 (CAR)

# post last coordinate to blynk cloud
value0="0"
value1=str(lat1)
value2=str(lon1)
value3="Car: " + str(GPSdate)
payload = {'value': [value0 , value1, value2, value3]}                                          r=requests.get('http://blynk-cloud.com/' + BLYNK_AUTH + '/update/V30', params=payload)

and location 1 (Bike)

# post last coordinate to blynk cloud
value0="1"
value1=str(lat1)
value2=str(lon1)
value3="Bike: " + str(GPSdate)
payload = {'value': [value0 , value1, value2, value3]}                                          r=requests.get('http://blynk-cloud.com/' + BLYNK_AUTH + '/update/V30', params=payload)

Yep, probably ran into map requests cache limit, which doesn’t take into account location indices. Just stores last 25 requests.
On local server you can increase this in server.properties file via map.strings.pool.size property.

More info: https://github.com/blynkkk/blynk-server/blob/master/server/core/src/main/java/cc/blynk/server/core/model/widgets/outputs/Map.java#L23