So I recently upgraded from an older version of Photoshop and I use the Liquify tool a lot.
The problem I'm having with the newest version is that instead of being able to "push" things where I want them, the second I click on an area with the Liquify tool, it starts to enlarge it (in a sphere shape). I have no control over which direction to liquify in. All I can do is control the size.
Sample image attached. If I click on the cat, it will just enlarge into a ball. I used to be able to squash it inwards, or stretch, etc.
If that does not help, does turning off »Use Graphics Processor« in the Performance Preferences (Photoshop > Preferences > Performance > Graphic Processor Settings) and restarting Photoshop have any bearing on the issue?