Sankaracarya's Vivekachudamani 568

एवं विदेहकैवल्यं सन्मात्रत्वमखण्डितम् ।

ब्रह्मभावं प्रपद्यैष यतिर्नावर्तते पुनः ॥

evaṃ videhakaivalyaṃ sanmātratvamakhaṇḍitam |

brahmabhāvaṃ prapadyaiṣa yatirnāvartate punaḥ ||

(Sankaracarya's Vivekachudamani 568)

It does not suffer transmigration having experienced seclusion as a result of being disembodied--being ever-identified with the one Reality, Brahman.

The soul doesn't suffer when it leaves the body. By right the soul is suffering by staying in the body because it's not the eternal place for the soul. The self surrendered soul or those who fully give their soul to the Lord will never worry about passing out from the body. Their main concern is to go back to the Supreme Lord, where the soul belongs to.