Occasionally images and buttons blank

This is does not always happen, but occasionally, when I select a package, the package description page doesn't fully display. The sample images are blank, and the Install or Launch/Remove buttons don't show their text. This happens until I move the mouse over the window's headerbar widgets (i.e. the - + x controls in the top left of the window). At that point, everything suddenly appears as normal. This is the only program this happens in, and it is only happening occasionally (maybe once out of every 10 to 15 times I select a package in Software Manager).

No files or tests are named. Start by reproducing package selection in Software Manager across repeated attempts, then observe whether moving over the headerbar causes the missing images and button labels to appear. Done means package descriptions consistently render their sample images and Install or Launch/Remove button text without requiring headerbar interaction.