And, to answer your original question. This does not look like a situation where too much data is being sent through direwolf. It is only sending 4 packets before waiting for an ack. This looks more like one side can't hear the other reliably, or something is going wrong on the KQ4RST-1 side.
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By the way, what is the soundcard/radio setup for these stations?
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And if it helps. here are? some of the bpq port settings that have worked for my 300 baud HF port.
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FRACK=8000
MAXFRAME=1
PACLEN=60
TXDELAY=200
TXTAIL=20
SLOTTIME=100
PERSIST=64
NOKEEPALIVES=1
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-Brent WG0A
Brent WG0A