Contradiction with Acts 14:19
While Acts 15:32 speaks of Judas and Silas, who were prophets and exhorted the brethren, Acts 14:19 describes a scenario where Paul faced persecution and stoning, an opposite circumstance to encouragement.
Acts 14:19: And there came thither [certain] Jews from Antioch and Iconium, who persuaded the people, and, having stoned Paul, drew [him] out of the city, supposing he had been dead.
Contradiction with Acts 15:39
Acts 15:32 highlights the harmony and encouragement provided by prophets, whereas Acts 15:39 shows a sharp contention and disagreement between Paul and Barnabas.
Acts 15:39: And the contention was so sharp between them, that they departed asunder one from the other: and so Barnabas took Mark, and sailed unto Cyprus;
Contradiction with 1 Corinthians 14:33
Acts 15:32 implies communication through prophecy for encouragement, but 1 Corinthians 14:33 states God is not the author of confusion, suggesting differing circumstances of communication.
1 Corinthians 14:33: For God is not [the author] of confusion, but of peace, as in all churches of the saints. [confusion: Gr. tumult, or, unquietness]