Meaning of "previous in system / Context" Chrome DevTools

[One Full Time Equivalent]

I was inspecting the Memory Summary of a Heap Snapshot of my node.js application in Chrome DevTools and found a leaked object to be reachable via previous in system / Context @266607. Can anybody explain what that means, exactly? I understand what context means in this case, but for previous I could not find any documentation.

You can answer directly StackOverflow, if you want.

https://stackoverflow.com/questions/72085788/meaning-of-previous-in-system-context-chrome-devtools