What is the concept of ‘Yogabhrashta’ in Gita?

The following is an excerpt from a samvaad (dialogue) session with Acharya Prashant.

श्रीभगवानुवाच

पार्थ नैवेह नामुत्र विनाशस्तस्य विद्यते ।।

न हि कल्याणकृत्कश्चिद्दुर्गतिं तात गच्छति ।। 40 ।।

śhrī bhagavān uvācha

pārtha naiveha nāmutra vināśhas tasya vidyate

na hi kalyāṇa-kṛit kaśhchid durgatiṁ tāta gachchhati

The Blessed Lord said, ‘O Partha, there is certainly no ruin for him here or hereafter. For, no one engaged in good meets with a deplorable end, My son!’

~ Shrimad Bhagavad Gita, Chapter 6, Verse 40

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प्राप्य पुण्यकृतां लोकानुषित्वा शाश्वती: समा: ।

शुचीनां श्रीमतां गेहे योगभ्रष्टोऽभिजायते ।। 41 ।।

prāpya puṇya-kṛitāṁ lokān uṣhitvā śhāśhvatīḥ samāḥ

śhuchīnāṁ śhrīmatāṁ gehe yoga-bhraṣhṭo ’bhijāyate

Attaining the worlds of the righteous, and residing there for eternal years, the man fallen from Yoga is born in the house of the pious and prosperous.

~Shrimad Bhagavad Gita, Chapter 6, Verse 41

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अथवा योगिनामेव कुले भवति धीमताम् ।

एतद्धि दुर्लभतरं लोके जन्म यदीदृशम् ।। 42 ।।

atha vā yoginām eva kule bhavati dhīmatām

etad dhi durlabhataraṁ loke janma yad īdṛiśham

Or he is born in the family of wise Yogins. Such a birth as of this kind is surely…