I'd rate Tampermonkey five stars instead of one but version 4.18 broke several scripts while version 4.17.6161 and other competing script addon like VM work fine with the same scripts. It's also being discussed on Greasy Fork but weirdly enough neither the author of the scripts nor the author of Tampermonkey seem to read, listen or care.
Have you reported an issue at Tampermonkey's bug tracker? Otherwise it is difficult for me to get notified of issues. BTW: I hope your issue is fixed in 4.18.1 which was released today.
