Localplay cutting out after ~60 seconds

I have a DTMF function set to play an audio file in rpt.conf over my simplex node. This audio file is exactly 1 minute and 30 seconds, but the radio cuts off its transmit for a brief moment after around 55 seconds, comes back on transmit, a few seconds later, the transmission stops. I have not messed with any of the Timeout settings, any suggestions as to why it’s cutting off?

The audio file in question is a .wav file that has been downconverted to the 8k sample rate Asterisk needs. The .wav file when played on my PC is the full length.

Edit: There is no TOT on my radio either.