Your tracking of the radial will be less influenced by any wind changes than the IRS drifts themselves.
what's that ? is it the new theory of drift due to wind ?
you're mixing two completely different situations.
first deals with change of heading to maintain a desired track due to wind, second is to compensate for IRS drift by amending the desired track !!
to answer the initial question, yes if you're flying manually the bird will be blown off by the increasing wind and you'll have to amend heading to realign bird and vertical blue track line. not doing that will create a deviation from the track increasing with time.