blocks not breaking in minecraft version 1.16.1

Can you provide a screenshot with your debug screen (F3) along with a short video. If the video is to big please upload it onto YouTube as unlisted and post the link here.

1. The following fields are conflicting. Please clarify. Version, Title

2. This seems to be a lag problem. Lag problems are generally not considered a bug, unless there is a clear reason and solution.