When two "/fill" commands are executed in the same area in turn, the effect in the "bug1.png" diagram is produced. The correct result should be all lava.
How to reproduce:
1.Stand in a place and execute the command "fill ~ 10 ~ ~ 10 ~ ~ water" in the chat bar
2.Keep the same position as before and run the next command in the chat bar "/ fill ~ 10 ~ ~ 10 ~ ~ lava 0 replace water"
3.You can see an effect like "bug1.png" where all the water should be replaced with lava, not a grid
We hope Mojang can fix the bugs in the next version,Thanks.
Linked issues
Attachments
Comments

Thank you for your report!
We're tracking this issue in MCPE-100607, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki