Stay away, God runs the world.
There was once a family in Bnei Brak that had 1 or 2 mentally unstable children. The parents went to the Chazon Ish and said that when people ask information about the other kids for shidduchim the neighbors always say it’s a crazy family. The Chazon Ish replied, “When the right one comes, the neighbors wont be home.”
The bottom line is, every person has an oppurtunity to do their checking, and Hashem puts people together. We don’t know the cheshbonos and for sure once their engaged (Hashem has done his work) everybody else should stay out of it.