Krall, Tino, Gajic, and Steiner are all getting substituted regularly throughout the game (they all came on as a unit at 5:21 remaining in the 1Q, went off at 0:25 remaining, etc).
It looks like you just had really long runs of play without a stoppage that the game engine recognized as a time where substitutions are possible (other than stoppages within a very short time of when the backups had come in, such that FDC wasn't ready to rotate the starters back in yet).
I've had similar results with FDC, I usually spend those games cussing at my monitor about how the BB coach is too incompetent to call timeouts to manage his rotation :shrug: