The cause is that your cloth is brand new and has not compressed (for lack of a better word).
Basically, the more you play it, the more compressed it becomes.
It's like rolling a golf ball on tall grass, versus the fairway. As the cloth compresses over time, it essentially becomes more dense, and thus, the balls don't "sink in". This equals less friction. Friction is what is causing the balls to come to an "abrupt" stop.
The general rule of thumb with cloth thickness is that there are tradeoffs to be made in determining cloth thickness.
"The thickness of the cloth determines the speed, accuracy and responsiveness of the table to spin, thicker cloths being more hard-wearing but slower and less responsive. "
However, thicker cloth will allow easier jumps, since there is some "give" under the ball which effectively produces "bounce" (see a few of the "slow mo" shots in the video at the very bottom of this site...)
What type of cloth did you use? There are low quality cloths and high quality cloths, and you'll notice this issue less the higher up in quality you go. (With Simonis being the widely accepted best in class)
You can see from this image (from simonis' web site) that the lower quality one is going to allow the balls to sink into them more.