My tweet https://twitter.com/KosterArt/status/1192855936492298240 shows this https://i.imgur.com/2MFPwPf.png.
I find no such image showing on the linked page https://www.nouwave.gallery/exhibitions/nou-wave-i , https://i.imgur.com/37qVGv4.png .
In fact I see no image at all on that page and maybe that's the trigger. Has Twitter chosen a substitute from elsewhere? If so, I hope any Twitter retribution for adult content goes against Twitter rather than me. :)