Qadi Khan records that an awkward stop and restart does not normally invalidate the prayer merely because the temporary phrase can sound wrong; correct places of connection and separation are often known only to specialists. Even examples producing a very ugly temporary meaning were treated leniently by many jurists in this specific stop/start category, although a stricter view is also reported.
The learner should still avoid bad stops and learn proper recitation, but should not automatically declare the prayer void after every breathing stop.