1.21+ clients mine slower with Mining Fatigue when using high Efficiency tools on <1.21 servers #865
Description
General Information
https://dump.viaversion.com/395540424a789e609eb1f506d74deb32aae79d95e491e18b8500962b948f3c3c
Bug Description
When connected to a server running Minecraft version below 1.21, clients on 1.21+ experience significantly slower mining if affected by Mining Fatigue and using high Efficiency tools (higher than V). In the video I'm with mining fatigue 2 comparing the speeds of breaking the block between 1.21.8 to 1.20.6
1.21.8 https://github.com/user-attachments/assets/5c4b83b1-f14e-4bfb-be0b-cd3af8587ce1
1.20.6 https://github.com/user-attachments/assets/906bc984-d0eb-469f-a39c-524d5192d5b4
Additionally if you have a really high efficiency it would break the block with delay.
Steps to Reproduce
- Join a server below 1.21
- Give yourself a tool with high efficiency and the mining fatigue effect (more noticable with lvl 2)
- Break a hard block
- Compare it to 1.20.6 and see it's slow
Expected Behavior
The block should break as fast as 1.20.6, not slower.