Sentence examples for has proven problematic since from inspiring English sources

That has proven problematic, since the period in which the four allegedly committed the crimes detailed in the Belgian case spans September 2011 and November 2013.

Application of the aphorism has proven problematic, particularly for anticipatory repudiations.

There are also notable cases in recent years when truly successful recasting has proven problematic.

Putting the new variety into the hands of farmers, however, has proven problematic.

Nevertheless, a lack of balance and proportion has proven problematic.

Quantitation of cell density in tissues has proven problematic over the years.

The disease's wide and patchy distribution has proven problematic for management and control decisions.

Regrettably harnessing the undisputed potential of the immune system has proven problematic (Gilboa, 2004).

The lack of coordination has proved problematic.

But that last step has proved problematic.

But that formulation has proved problematic in an economic downturn.