I will report it to the devs, but I doubt that they will be able to fix it, because BBCode parsing without breaking things is hard, and I suspect that to actually prevent this would require a significant redesign and come with a big performance penalty.
3 minutes ago, LoGiCalDrm said:
So... we have sneaky BBCode making return after last update.
BBCode has always been supported, there is just no editor for it. I suspect this bug has been around for a few months, since the parser was redesigned.