How many Kms has your CVT done and how many transmission oil
change has occurred?

Had a similar problem with my CRV auto at 165,000Km, identical to
the problem you described with your Jazz CVT. The pedal got mashed
to the floor occassionally by couple of family members.
I replaced the oil every 20,000km. I started to use non-Honda
oil(after 100,000Km, which was a folly). I had quotes for
repairs ranging A$2,500-4,000. I had to try a cheaper approach...

The clutch slip disappeared after I flushed the auto transmission
3 times with genuine Honda auto transmission oil at $40 each!
Still cheap compared to a transmission teardown. I did the same
to a friend's Hyundai which deferred the inevitable for 20,000km.
He had a 2nd hand auto supplied and fitted 2 months ago for $1100.

The slippage could be due to the crud buildup over 165,000km.
I don't know how long the transmission would have lasted if
I've kept the CRV. I sold it 2 years ago to buy a manual Jazz.
Easier to do a clutch replacement than on an auto/CVT.

Hopefully the teardown on your CVT could be postponed with a few
CVT oil changes and computer resets.

Good luck.