I am on Version:68.0.3618.63 and MacOS version 10.15.1 Beta.
The tab close (cross in circle) is not reliable. I have discovered that sometimes I have to click a very specific spot on the close icon to close a tab (usually a tiny area near the bottom of the close icon).
I also sometimes cannot select a tab using my mouse/trackpad but I can select it using the touch nav bar on my Macbook.
Anyone else experienced this?