Maybe. It's not unheard of that residuals left from a process could still become potent in some way. [It was one of many reasons why experiments had to be started over if contaminated equipment was used.]

This world allows for a lot of strange things, too. Like things continuing to exist here that should logically not be possible once you're stuck in another world, unless this world accumulates everything from every world. Like ... the blessing from a god. If you're here, away from that source of power, the connection should logically be severed, or at least weakened. But that doesn't happen.