The latest build, 22490, has broken nearly all custom maps that balances a map’s gameplay with custom values on upgraded units or buildings.
The reason is due to the “Use Relative Upgrade Costs” being forcibly unticked from “True” to “False.”
FALSE = Upgrade cost is calculated as the difference between the two units/buildings that are to be upgraded.
TRUE = Use the cost of the new unit/building only, do not calculate the difference.
Very popular maps affected includes:
Legion TD
Hellhalt
Castle Fight
Survival Chaos
Zombie Defense
Monster Defense (Suffering item stack bug as well)
Every Tower Defense map made, as upgrading towers are no longer balanced
Every Mauls map made, as upgrading towers are no longer balanced.
Every Blood Tournament maps made as upgrading buildings are no longer balanced.
This constant of “Use Relative Upgrade Costs” being forced from True to False has broken the balance of many popular custom maps to the point that buildings, units (custom units that upgrade into a further custom unit) and a few upgrades are free or even give resources to do such an action.
This is seen most prevalent on Legion TD, whereas you can gain gold by selling towers unfairly.
For any mapmaker requiring a solution, please see https://us.forums.blizzard.com/en/warcraft3/t/build-22490-guide-to-fix-custom-map-upgrades-bug/34436