MinePersist

In vanilla Minecraft, changing hotbar slots with the scroll wheel or number keys interrupts mining and the damage progress on the block is lost. MinePersist stores the current breaking progress when this happens, as a percentage from 0 to 100 based on elapsed time. If the player starts breaking the same block again shortly afterward, the stored progress is restored and breaking continues where it left off. A small timeout stops progress from being kept indefinitely, so a player who walks away or moves to other targets does not keep it.

Because the progress is tracked as elapsed time, a faster tool switched in mid-break speeds up the remaining work rather than reapplying the earlier progress. The crack animation and visual progress are restored along with the breaking logic, so the on-screen state matches the actual break. The mod works with Forge on 1.20.1 – 1.20.6, with six release versions, and is released under All rights reserved, so it is not open source.

Installation is recommended on both the client and the server. The mod is classed as client and server, so the server and every player need it for the behavior to stay consistent.