In 1.14.2, /reload took up to 20 seconds to load all new datapacks. Now, in 1.14.3 Pre-1 it just doesnt load any when there is too many new ones to load. (I am using 50 datapacks at once in one world).

Added my datapacks folder as requested in zip-format. It has been tested in 1.14.2 where it took around 20 seconds, while 1.14.3 Pre-1 "gave up" after a few seconds.