I have run into this bug several times now and I can replicate it easily across all devices. If I post 3 images using the image tool on any of the mobile app platforms, the first tag always changes what image it is supposed to display. Since that's hard to explain, I took 3 random images and attached them to this question. Then, took a screenshot of before.
Hit preview... And chaos erupts. The first image always changes to a different number than it should be.
I've replicated this on both Android and iOS.