Cache of your browser/computer
It can rarely occur that the "Cache" of your browser/computer contains old files. Your browser/computer automatically saves data in the cache to, for example, make websites load faster. You can solve this by pressing "CTRL + F5". This will make the old files disappear from the cache and could lead to a solution when some users or invitees still see old data or something is not working as it should. Please note that this hardly ever happens.