Did not test other versions of the game, only 1.14.2. For some reason, water does not update properly in my creative superflat building world I experiment all my builds on. This happened after I accidentally blew my build up, and then I tried to rebuild it. Strangely, the water did not flow properly.
I can't seem to upload the video (too large) so here is a youtube link to the issue: youtube video
Sorry if the video is a bit bad, my laptop is pretty slow :/
Isn't this just normal water physics? The water tries to find the nearest way down. In this case, it sometimes selects the block to the left to flow into. That is not always reflected in the texture.