Try having Band-in-a-Box build the complete song file prior to begin playing the song file.

You can change the program's default behavior by selecting "Options", "RealTracks" (or Ctrl-E) and removing the check marks from "Speed up generation of RealTracks" and "High Quality Tempo/Pitch Stretching". See screenshot below.

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Jim Fogle - 2025 BiaB (Build 1128) RB (Build 5) - Ultra+ PAK
DAWs: Cakewalk Sonar - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home