Cant grind flowers in a public server since its only once in a server life time they dont respawn so you need a PS(poor for one i begged for this game lol)
if you arent finding flowers its because whenever a new server pops up and you or someone else collects them they somehow dont respawn so i recommend joining a private server so its a 100% chance of getting flowers
I do not think this is patched, try going into a vip server and reseting it after each time you leave. Flowers may take some time to load into the cave aswell