The block-breaking texture is displayed even when the player has stopped breaking the block.
Note: I'll make a video of the bug later.
[media]Linked issues
Comments
Please let us know if either MC-69865 or MC-157404 describes the problem that you're experiencing here. If not, please provide steps on how we could go about reproducing the issue. Thanks!
This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki

I think MC-69865 describes their issue best.
does MC-157404 describe your issue?