I don't have any experience about moonlander miner but it looks like it's a normal issue of some pools according to other members here on the forum. The only solution that I found to fix your issue is to test it with other pools and adjust share difficulty.
I found same logs as yours check this thread
https://bitcointalk.org/index.php?topic=2664101.msg27364798#msg27364798You can follow some suggestion from the link above it might help.