I use google chrome for Roll20 first of all, but occasionally whenever i input a map and later on insert tokens onto the map such as character tokens, cosmetic chests and tokens for monsters, every so often when i refresh one of two things occur, either all the tokens on the map are deleted simply leaving the basic map behind or the map itself is deleted leaving the tokens behind, this would be acceptable if it were a one off occuranse however it has happened multiple times within the last few months and after much researching to no avail have i been able to remove it with anything i try via searching online.