Is the transparency bar broken?..

Transparency it's adjustable in the settings of the game bar in the personalization section, take into consideration that all this are on the latest version of the game bar

Thank you, transparency is at 100% in both bars as you can see other widgets are transparent but only the group one seems bugged, everything is updated but let's see in the future, greetings : )

Hello again, good to know back to normal.

But this is an option of the Game Bar, if it is the bar settings has the widget transparency option but works only if you fix the widget.

would be useful, I would even like to be able to make the bar smaller when you are transmitting or be able to make it more transparent

I figured this out! Not sure if it was a change they made with this update, but it seems to have resent the 'widget transparency' option in the settings. Open game bar, click the settings "gear" then under 'Personalization' there is a section for 'Widget Transparency". Farther under that, there are two sliders that just say 'Pinned", set those both to 100 and it'll be fully transparent again. The way that settings screen is set up it feels like it's two unrelated sliders.