Q.Why do my tomatoes crack
Why do my tomatoes crack when I bring them in the house? I don’t have problems with them cracking on the vine. Only when I bring them inside. They’re cherry tomatoes. I don’t know if that makes a difference. I thought it might be the sudden change in temperature.

Tomatoes continue to ripen off of the vine, so if they are cracking after picking that have just ripened to that point.
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-cracking.htm