Blocks drop nothing, when datapack is enabled

I created data pack on 1.13.2 with many functions, loot tables, tags, recipes, advancements. After 1.14 came out, I tried to add custom block drops, but after adding even single block loot table, every block started to drop nothing. I actually know what happens, but I couldn't find anything about it. So, apparently it's caused by typos in recipes, quiet strange, isn't it?