See this screenshot:

I originally wrote the top and bottom text in normal mixed-case, expecting the meme generator to appropriately use an all-uppercase impact font (separate UBN task for that issue coming soon). When changing the text to uppercase, I ended up with a preview meme as shown. Replacing any of the text with new text results in a new, correct preview. Removing all text and copy/pasting it results in the same preview as shown. This affects both the preview image and (as expected) the final, saved image.

Since this is a revenue-impacting bug, please provide a timeline for expected resolution and keep all stakeholders in the loop. Post-mortem scheduling to follow.