From the changelog: https://wiki.factorio.com/Version_history/0.17.0

0.17.65
Date: 14.08.2019

"Fixed that infinite item based resources with yield of more then 100% didn't actually mine more. So yield of 260% for example means that it mines 2 resources and 60% probability of 1 extra."

On 1000+% resource patches, this makes mining incredibly fast.

Thanks for the heads up! I'll try to get around to updating the mod this weekend. Haven't played in a while so I'll have to update my game and test it out with the new changes. My intent is to make resources not deplete, but they should mine at the normal rates.

Updated! Resources should now always spawn at exactly 100% yield.

Thanks for the quick update and making the mod!