was it the same track or a different track ?
My car is what Id call "stupid good" most the time, last weekend at one track it was 1.098-1.101 all day, yesterday at a different track, 1.028-1.036 ... only difference is one tracks 60ft cones are off.
Even on the same track day to day, as long as its consistent all day on that day I wouldnt worry a bunch, but if it starts moving around a lot Id start to worry.
Loose converters are deadly IMO but normally not fast.