Never seen a small piece warp from heat from machining, but you never know.
Type of slice , mc. may factor.
I'd check the mc.
Do the oven dry test (microwave method)
1. Weigh each section on a balance that has precision of 0.5 percent of the weight of the section and that reads in grams Triple beam or top loading pan balances are suitable for this
2. Microwave the wood, short times low/med heat, just get it hot untill barely any steam (not too hot,, it can catch fire).
Let it cool.
3. Repeat untill the wood looses no more weight.
4. Weigh the wood again
it should take about 15-30 min total
5. (Original weight—Ovendry weight) ) / (Ovendry weight)) x 100
will be your mc.
Ovendry test from Kiln operators manual
jim