Did you try Save config in your miner settings to make it restart? You don't need to change any settings just hit the Save button there under Miner Configuration.

I switched back to pro hashing today and haven't noticed the issue yet.

I noticed the same issue today for the first time as well with my single L3+. Yesterday was my first day and I didn't see this problem. I'm new here, not sure on protocol. Should I submit a ticket? Edit: I've switched to litecoinpool until I learn more about internal config settings on my ant miner ...