I am getting frequent errors like these with dual mining:

[INFO] [2018-05-28T09:24:16+02:00] Turning on experimental support for Ethash & DCR/XVG Dual-mining
[INFO] [2018-05-28T09:24:16+02:00] Bminer: When Crypto-mining Made Fast (v8.0.0-32928c5)
[INFO] [2018-05-28T09:24:16+02:00] Watchdog has started.                        
[INFO] [2018-05-28T09:24:16+02:00] Starting miner on devices

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[INFO] [2018-05-28T09:24:16+02:00] Connected to xvg.blake2s.com:8888            
[INFO] [2018-05-28T09:24:16+02:00] Subscribed to stratum server                
[INFO] [2018-05-28T09:24:16+02:00] Set blake2s nonce to 81000aa5 (extralen = 4)
[INFO] [2018-05-28T09:24:16+02:00] Authorized                                  
[INFO] [2018-05-28T09:24:16+02:00] Starting miner on device 0...                
[INFO] [2018-05-28T09:24:16+02:00] Set diff to 50.00 (target to 00000000051eb333) (Blake2s)
[INFO] [2018-05-28T09:24:16+02:00] Received new job 1c7 (Blake2s)              
[INFO] [2018-05-28T09:24:16+02:00] Started miner on device 0                    
[WARN] [2018-05-28T09:24:16+02:00] [D0] From Stratum Channel, ethash miner cannot process message ethash.blake2sJob, {1c7 [0 0 32 4 106 46 235 51 109 140 221 23 37 128 176 33 38 240 219 29 58 42 222 114 20 199 101 149 0 0 172 20 0 0 0 0] [91 11 173 176 26 2 30 50 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] 36 8 [2 0 0 0 176 173 11 91 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 255 255 255 255 31 3 144 227 33 6 47 80 50 83 72 47 4 143 174 11 91 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] [121 105 105 109 112 0 0 0 0 0 1 128 234 130 43 0 0 0 0 35 33 2 215 69 59 112 87 2 144 236 170 222 134 48 115 250 199 2 212 213 218 210 69 89 125 121 11 8 202 201 252 202 71 129 172 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] 63 59 [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] 0 00002004 5b0badb0 true}
[INFO] [2018-05-28T09:24:16+02:00] Connected to daggerhashimoto.hk.nicehash.com:3353
[INFO] [2018-05-28T09:24:16+02:00] Subscribed to stratum server                
[INFO] [2018-05-28T09:24:16+02:00] Set nonce to ebc0a2                          
[INFO] [2018-05-28T09:24:17+02:00] Starting the management API at 127.0.0.1:1880
[INFO] [2018-05-28T09:24:17+02:00] Authorized                                  
[INFO] [2018-05-28T09:24:17+02:00] Set diff to 0.50 (target to 00000001fffe0000)
[INFO] [2018-05-28T09:24:17+02:00] Received new job 0000004b2ee0cabd            
[INFO] [2018-05-28T09:24:17+02:00] [D0] Tuning dual-mining parameters          
[INFO] [2018-05-28T09:24:17+02:00] [D0] Creating DAG                            
[INFO] [2018-05-28T09:24:22+02:00] [D0] DAG has been created    

Command line used:
BMiner.exe -api 127.0.0.1:1880 -uri ethstratum://AbC38RezoGeEmA5ziAKNvxk34cM9JWsMCo.UserName:x@daggerhashimoto.hk.nicehash.com:3353 -uri2 blake2s://DDXKDhq73GRM3hjh6uee57fJ3LS2ctNtyi.worker:pwd@xvg.blake2s.com:8888