'problematic consequence' is correct and usable in written English.
You can use it to refer to an undesirable effect of something, e.g. The government's decision to close the schools has had a problematic consequence of increasing the levels of poverty.
Perhaps the most problematic consequence of the war paradigm, though, is that it gave the president enormous powers — as commander in chief — to determine how to detain and interrogate captured combatants.
A visible abutment-restorative interface is a problematic consequence, especially in the esthetic zone.
We see once again a problematic consequence of interpretations of the argument for mental anomalism (Kim's and now Campbell's) that highlight a strong distinction between normative and descriptive principles.
Just last month, Ohio faced one such problematic consequence of a toxic algae bloom when cyanobacteria contamination forced a water supplier to warn customers not to drink water from their taps.
'After cooking darkening' is another problematic consequence of enzymatic browning.
The most problematic consequence is the difficulty and even impossibility of efficiently exploiting the large and ever increasing amounts of "genomic" data.
The industry minister, Antonio Marzano, said in a statement that Fiat "must seriously evaluate the problematic consequences of job cuts".
'And at around two in the morning they started tagging themselves.' This would have unforeseen and problematic consequences.
But critics of e-Verify, from the right as well as the left, consider Mr. Camarota's forecast to be an unlikely scenario that also overlooks a number of unexpected, problematic consequences.
Bartholomew, the spiritual leader of the world's 250 million Orthodox Christians, stopped short of taking sides but said that divisions in the church would have "problematic consequences for Ukraine's future".
"We have reached a critical moment that could prove to be a turning point for Europe as we know and enjoy it – one that might result in a cascade of problematic consequences and political fall-out," he writes on his website, where the posters are available to download and share.
