Hi Son of Belmont
It sounds like it’s a system issue,. so, to answer it better, i’d need to know what sort of system you’re using and what the specifications are.
PC or Mac,../ Which O.S. / How much RAM and free hard disk space, / What Graphics card (Make and model)
There are other things which can also effect playback, such as other (background) programs running in memory.
have a look at what programs are rtunning and what you can disable whine you’re working ion an animation.
You can also change the display options in Daz Studio, to display “bounding boxes” instead of the full 3D mesh
Hope it helps