For the moment I am to excited about that 67 Mhsh seeing in the miner and I am staring at the Anydesk from almost half hour now.I don't even have a new motherboard with BAR option to give another boost otherwise I believe I would be seeing 75 Mhsh without problems here.I will update in due time to the new version,no worries about that.
It has a few more stale shares than other miners but I am sure it will be fixed in other versions as I have a 100 Mbps fiber connection and with all other miners I had like 0.75% stale,now I have near 2% but I can accept this also as long as it is stable and does not crash.
I took this long to write because I am way to excited seeing a miner not crashing with my Powercolor RX 6800 XT-s,every other one has crashed so far.

To be clear, these are not 2% stales, these are 2% invalid shares. Your overclock settings are way too high, they are crashing because they are unstable overclocks. Dial them down to a more sane number.
My stable OC 6800(xt) show 67-68M on TBM.
Also, SAM or BAR do not help hashrate. They increase the rate data can be pushed to the card, but that is not a bottleneck for mining, if it were, x1 risers would not be used.
I was going to write the same thing about its settings ... simply review your settings ..
Just 2% of badshare or stalle is 65$ shortfall, it fills pools with bad stocks and results in poor quality pools on a large scale...
Juste for information i have 1 badshare with my farm: Gminer (NoLHR) and TRex (LHR)