This was never a problem until this update, where people are saying that riptide overall has been nerfed by around 20%. No one else has made a report on this from what I have seen so far.

I stand in a 1x1 water source, while pushing up against two walls. Before the update, you would still get launched up, but afterwards, you fly up a block or two, and then get sent back down. When I moved slightly off of the wall however, Riptide works normally. I have attached a youtube video showing this.

The onedrive link apparently wasn't working, so here is a youtube link:

https://youtu.be/l-a39jRzZ8E