I can confirm that the memory leak exists, I even had a picture of it taking a whole 14.8gigs of my 16gigs of ram, but thats lost to the depths of discord chats now. Anyways, It was specifically after leaving a picture from my art class open for a day or so while also tabbing into it periodically, leaving it zoomed in, and running it in the background while playing several games, namely Rainbow Six Siege, at one point I came back from getting lunch, tried to open steam to launch the game, and the whole PC was locking up hard as though its ram was full (which Ive experienced in the past with other PCs and know how to recognize at this point.) So naturally I opened up Task Manager and Resource monitor to see that I had less than 500mb of free ram and dropping by the minute, periodically dumbing about 400 or so mb to not crash. Task manager was reporting that Photos was the culprit frantically jumping around as it gained and dumped data.
If it helps, since someone in this thread mentioned it, I do use a NVIDIA GTX 1070 and its associated drivers though I doubt they would effect it as ram and vram are seperate (and the integrated graphics of my laptop would take priority on an application like photos thus seperate drivers).
Anyways, heres hoping it gets fixed at some point, in the mean time Ill just be sure to actually close my art files next time.