Easy place have a cache to avoid repeating action on same position before block state sync (see https://github.com/sakura-ryoko/litematica/blob/pre-rewrite/fabric/1.21/src/main/java/fi/dy/masa/litematica/util/WorldUtils.java#L528).
Litematica Printer will try to harvest a dirt block multiple times if the blockstate is not update after the first try (vanilla client won't predict harvest action).