I have had a couple multiplayer servers I've run with 10.4 and 10.5. Sometimes I'll find ore and it will be like 100% small copper deposit. When me and my buddy go to mine the ore there isn't anything we can see. Now round deposits. We tried digging around but no luck finding anything. The first time I ran into this we tried relogging and varous things with no luck. I finally had the server regenerate ores and then the missing ores were showing up again. Is this a known bug?