They’ve done this since they were added to Legacy Console Editions all the way back on December 19, 2017. In fact, there’s a picture on the Minecraft Wiki of the fallen trunk generating on water, and in the background is a lone stump like you described. The trunk portion can also generate in caves or hanging off of a ledge if the circumstances are just right for it to do so.
I have an integrated graphics card in my laptop (AMD Ryzen 5 5625U with Radeon Graphics) and I have this problem while using both OpenGL and Vulkan graphics. I tested it on 26.3 and 26.4-snapshot-8 and it’s still happening. I can’t get any recordings of it happening since my recording software got messed up but it’s identical to the ones everyone else has already posted