Ah yes, two tests in that famously fast-bowling friendly venue of the UAE, followed by a series loss to India, in which he still took 13 wickets at 34.5. Not great, but still better than his career average vs India, the team which he struggles against the most.He's rebounded since but in the period immediately post it was worse.
His next 7 tests yielded a S/R of over 70 & average of 38
And if we're cherry-picking stats, he then averaged 16.4, 24.5, 31.5, 17.0 and 17.9 in his next five series.