After 3 hernia operations, a medium sized bubble formed about 4cm below the stitches?

After 3 hernia operations and the last one being massive, there has been a sudden development (at least we think so because there hasn’t been any symptom) a medium sized bubble formed about 4cm below the stitches in the abdomen and it burst open and what we think was the bowel on the digestive tract came gushing out.
Later when we got an ultrasound done they said that there was pushed formation as well.
What could be the problem?
The previous hernia was at an advanced stage and by god’s grace and thanks to the doctors it went well but now there’s this new scene
What could be the problem?