It seems there's a bug that's been around for (at the least the past) 2 years: the theta radiation gates stop closing by themselves randomly. I would even come to a dead stop as I watch the "closing the gate" meter fill up, and seconds later I watch the meter disengage and I have to interact with the gate to close it again, and there have even been instances where the "closing" disengages TWICE before it successfully closes, but by that time you would have lost all 3 ships because of the damage they accumulated while you were trying to close the gate.
Every single playthrough of that TFO has at the very least 1 gate that disengages as you're attempting to close it.
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