Created attachment 406591 [details] png diff similar to the bots fast/flexbox/image-percent-max-height.html Flaky since a long time ago. First failures: WPE Release: r234948 WPE Debug: r234960 100 iterations: 1/100 passed (only the first) These failures generated the image diff with the actual image translated to the left. 100 iterations --run-singly: 92/100 passed 20 iterations --run-singly: 14/20 passed These failures matched the bot ones, with very small differences in some sections