What happens to people whose bodies are not cremated? Do they face problems in theafterlife?
Per the Shiva Purana, people who are not cremated are not reborn:
6.21.36: The procedure of obsequies shall be followed. If their bodies are not cremated they are likely to miss the good goal.
The translation is not very good, so let us retranslate using the original verse:
asaṃskṛtaśarīrāṇāṃ daurgatyaṃ naiva jāyate
Thus, we can interpret the line to say:
An unprepared corpse will suffer misery and not take a subsequent birth.
And if there is no rebirth, the soul becomes a lost, wandering spirit, incapable of accumulating karma and moving on.