How/where to report bugs for Unity UI AutoLayout?

How to report bugs about the ( old ) Unity UI AutoLayout while version 3 is in experimental mode? Auto Layout | Unity UI | 3.0.0-exp.4

I posted 2 bugs here [1][2], but no replies so far, so I want to make sure I’m posting in the right location.

I understand there’s work on the new UI system, but the old one is also still in use. So before UGUI 3.0 leaves experimental status, would be nice to be able to submit bugs to the team.

[1] LayoutGroup checks disabled ILayoutIgnorer components for their value
[2] Unity UI Auto Layout loses "driven by" and auto-values, if deeply nested layout group not direct child of another layout group

Though the bug reporter: https://support.unity.com/hc/en-us/articles/206336985-How-do-I-submit-a-bug-report

The forums itself are not an official means of submitting bugs.