On the second day of mining Koinos, I have two miners running and I probably lost a couple of proofs due to errors while submitting them. This is my guess, of course.
As 
This release will automatically update user endpoints to http://mining.koinos.io if they have kept the default on their miner. Additionally, retry logic was added in order to provide more stability while mining. The Koinos Miner version is now featured next to the Koinos Miner logo so that it is easily identifiable when issues are submitted.
Installing it is one minute work with all your settings intact.
Are there any local logs on Windows installs where you can check for errors? Thanks!
Anyway, keep on mining.
Good luck, everybody!
Important links
https://www.koinos.io/ | https://www.openorchard.io/
Announcing KOIN Mining & Koinos Whitepaper
Koinos Miner Installation and Configuration
More about Koinos platform & KOIN mining
13.10.2020 - Koinos KOIN Mining, First Proof Submitted, First KOIN Received
11.10.2020 - Koinos platform Announcement & KOIN Miner Setup - Mining Start On October 13th 2020
Better and better