This bug was fixed in the package mesa - 19.0.2-1ubuntu1.1
--------------- mesa (19.0.2-1ubuntu1.1) disco; urgency=medium
* radeon-rework-gfx9-scissor-workaround.diff: Fix invisible elements with GTK on Vega/Raven. (LP: #1831498)
-- Timo Aaltonen <email address hidden> Mon, 03 Jun 2019 23:52:07 +0300
This bug was fixed in the package mesa - 19.0.2-1ubuntu1.1
---------------
mesa (19.0.2-1ubuntu1.1) disco; urgency=medium
* radeon- rework- gfx9-scissor- workaround. diff: Fix invisible elements
with GTK on Vega/Raven. (LP: #1831498)
-- Timo Aaltonen <email address hidden> Mon, 03 Jun 2019 23:52:07 +0300