Has the Graal bug, which allowed completing it in one day, been fixed?

In general, I tested this issue on a test map, and... finally, it worked! It turned out that this bug hadn't been fixed even in SOD with the SP plugin, and it also exists in HOTU, so it successfully carried over. Everything worked exactly according to the "let's assume" system that I described above. In fact, using this system, you can sometimes save time on digging for the Grail by at least half the number of days, having additional heroes nearby with units that have movement speeds of 3, 6, 9, and 11 for convenience, so that the moves coincide (it's convenient to count in cells: 1500, 1700, 1900, and 2000 moves for an even count), if, of course, the Grail isn't located on rough terrain (snow, sand, swamp, stone) and you don't have enough pathfinding (to fully cover the penalty) or boots of the wanderer.