I have had bug problems with my last maple log. I suspect the tree had bugs before it was dropped, or it was cut in weather that was too warm. I took all the precautions I could, like getting the bark off, sawing it up ASAP, etc. And still had bugs (powder post beetles, I think)
I recommend cutting stock blanks out right away before the wood starts to dry much. This last log, I let the planks dry several months before I realized I was getting a lot of stress checks. I then cut it into blanks, but I'd already lost some primo steaks because of checking.
If it's cut into in stock blanks right away, the pieces of wood are much smaller, and can shrink without so much wood loss.