When the Āhāraka Śarīra (conveyance body) returns to the original Audārika Śarīra (gross body) after accomplishing its mission, for a short while there is the combination of the Kāyayoga (physical activity) qua the Āhāraka Śarīra with the Kāyayoga qua Audārika Śarīra until the former is dissolved.
ihāhārakamiśraśanrakāyayogaprayoga āhāra-kasyaudarikeṇa miśratāyāṃ sa cāhāratyāgenaudārikagrahaṇābhimukhasya.
(Bhaga 8.63 Vṛ)