Bet you had finger inserts.

Cracked bridges are easily fixed and won't have any effect on performance.  I don't think any ball manufacturer would do anything about a cracked bridge anyway.  My spare ball (Lane #1 XXXL) has had the bridge crack twice several years ago and it's still doing just fine, including being used as a strike ball for shorter/drier conditions.

Bet you had finger inserts.

Yes,

And for total honesty....I'm not so sure the bridge width is 1/4....both seem a little short from my view....

I have had a bowling ball sitting on a cold damp basement floor for years and it never cracked. I have also had a bowling ball in my trunk over the summer (forgot I left it there) and it was fine when I discovered it three months later. On the opposite end, I have had two bowlings that were sitting on a rack at room temperature and they both cracked.

I always wonder if the cracking of bowling ball is similar to what you see in a windshield. There might a small weak point and finally it goes. I have no clue what causes that weak point to happen. It just does on some bowling balls.

Bridges should be 1/4 inch, and total pitches should add up to 3/4. So, you can go 1/4 1/2, 1/8 5/8, 3/8 3/8, whatever adds up. Following these rules, you will never have a bridge that meets at the bottom.

Now me, I don't bevel the fingers at all, and don't use grips. Started doing that about 13 years ago. On a first drill, I've never had a ball crack around the fingers.

Stopped using inserts in 2001 and have yet to have a bridge crack. Could be several factors but lucklily I have not delt with any of them lol.