Happened with my rats too. The only ones that escaped and refused to be caught were the self-black producers. That line got culled entirely.

I had one female breeder who got out and came wandering all the way to the far side of the house to find me and sit on my foot. I took her back and gave everyone lots of treats.

Old Man rat used to jump out of the bin, climb up me to sit on my shoulder every day when I opened his bin.

The rats don't hate their bin homes. They seem pleased with them as long as they have food water and clean bedding.