When insta-mining, sometimes a block that is not visible to the player still acts like a block but one cannot break it without placing a block there first. This got patched a while back but it is here now. Please re-fix this
Related issues
Comments
violine1101
Peteydog1234
Thank you for your report!
We're actually already tracking this issue in MC-156852, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved. Depending on the resolution, that can mean that it either will be fixed in the next version, or that it is not considered a bug and won't be fixed.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.