Missing buttons on zoomed-in pictures

[bugith]

Using a supported version?

• [X] I have searched searched open and closed issues for duplicates.
• [X] I am using Signal-Desktop as provided by the Signal team, not a 3rd-party package.

Overall summary

Missing buttons

Steps to reproduce

Click on a picture in a conversation Standard view shows 3 buttons up right Click in the picture to zoom in The pictures is displayed zoomed The 3 buttons disappear although still there (see capture, the mouse cursor turns into a hand on hoover over the 3 buttons)

Note : no restart after update pending, what is known to trigger the same kind of issue. Same behaviour with the 3 themes

Expected result

Buttons should not disappear

Actual result

Buttons disappear

Screenshots

Signal version

7.4.0

Operating system

Ubuntu 22.04 w. wayland

Version of Signal on your phone

7.1.3

Link to debug log

No response

[ben-biddington]

This appears to be due to (stylesheets/components/Lightbox.scss):

&__container--zoom {
    .Lightbox__header,
    .Lightbox__footer {
      opacity: 0;
    }
  }

Even changing opacity to 1 is enough to show the controls.