Hey, no matter what version is used (12.0.1 or 12.1.0) there's a lot of rejected share for the Beam algo (~20%, with no oc at all)
Also, it's impossible to use another pool that sparkpool for beam (tried with and without rig name) :
[INFO] [2019-01-17T15:00:18+01:00] Connected to beam-eu.leafpool.com:3333
[WARN] [2019-01-17T15:00:18+01:00] Rejected share #login (Login success)
[INFO] [2019-01-17T15:00:18+01:00] Received new job 55907
[ERRO] [2019-01-17T15:00:21+01:00] Failed to parse the response: %!s(*stratum.RawIncomingMessage=0xc420156af0), error: json: cannot unmarshal number -22 into Go struct field .code of type uint
[ERRO] [2019-01-17T15:00:23+01:00] Failed to parse the response: %!s(*stratum.RawIncomingMessage=0xc420156c50), error: json: cannot unmarshal number -22 into Go struct field .code of type uint