Miningpoolhub / Bminer - discovered issues

[tvavrys]

We tested zecproxy with latest Bminer and Miningpoolhub with Auto Exchange and Auto Switching enabled (Equihash only).

The proxy works well but we have noticed a few issues. There is a pretty large occurrence of errors like this

2018/04/04 10:10:55 INFO # Work from rig002 rejected: job not found
2018/04/04 10:06:44 INFO # Work from rig002 rejected: low difficulty share of 1056.3631504974396
2018/04/04 09:52:26 INFO # Work from rig002 rejected: invalid solution

and every 40minutes the proxy restarts itself due to reported issues above.

2018/04/04 10:06:44 INFO # Work from rig002 rejected: low difficulty share of 1056.3631504974396
2018/04/04 10:06:44 ERROR # Too many rejected shares : 5
2018/04/04 10:06:44 WARN #  - rig002 : 5 shares rejected
2018/04/04 10:06:44 ERROR # Closing all connections...
2018/04/04 10:06:44 ERROR # Waiting 10 seconds before attempting to restart the Stratum Proxy
2018/04/04 10:06:44 INFO # Pool closed the connection...

Do you have an idea why this happens? Thanks for your help.

[tvavrys]

We have reduced the rate of job not found and invalid solution dramatically so the remaining issue is why we receive so many low difficulty errors.

2018/04/04 10:06:44 INFO # Work from rig002 rejected: low difficulty share of 1056.3631504974396

[appkoders]

How did you reduce your your rate of job not found and invalid solution?