On October 6th 2021 00:00 PDT the full version will be updated to v1.01 and the demo version will be updated to v1.02. One of the main updates is to truncate the registered scores into the Steam leaderboards system by 5 digits. The actual scores will be shown like normal within the in-game Ranking menu. Replays from previous versions will still be fully compatible.
However, due to this reason new high scores will not be registered because it will be lower than the ones already registered on Steam leaderboards. To address this, on October 6th 2021 00:00 PDT the leaderboards will be reset, deleting the posted scores and the attached replay files.
It is suggested to download the replays from the online leaderboards if there are any replays you wish to keep before it's reset.
Thank you for understanding.