Okay another example of where openaps not doing what I would think it would do. The situation is where he is low and stays low. It looks like openaps simply tries to cancel a high temp if there is one but doesn't try to implement a low temp basal. Basically when Dexcom shows a low, it just reads 39 the entire time. Therefore tick and avg delta = 0 if you stay low for a while and you get this:
IOB: 1.22, Bolus IOB: 0.00
Avg. Delta: 0.0, BGI: -26.6
15m deviation: 80
BG: 39+0 -> 21-21 (Unadjusted: -59--59)
BG 39<110, avg delta 0>0; no high-temp to cancel
If he stays in this situation for more than the 30 minutes then any temp basal implemented as he is dropping runs out and no new low temp basal in enacted which I think it should. Several ways to address this. The first to deal with this exact scenario of it reading 39 and staying 39 but I think openaps should have some feature that says if below some cutoff it recommends a temp basal of 0 regardless of any projections or other calculations. This would be safest. The temp basal in the calculation above was one we put on manually.
Here is the chart. The scenario is that he goes to bed at around 125 but with a lot of insulin. My wife gives him 12 carbs of sugar and turns off his basal for 2 hours. The openaps system was sitting at this desk where he was studying so when he went to bed it was out of range but presumably it would low temp him like my wife as done. He begins to drop a little while later and we begin to feed him a ton of sugar at that point but regardless he goes low on the Dexcom and stays there for more than an hour. I move the openaps into range around 12:30 am once he has already hit low and it gives the recommendation above. I even temporarily turn off the low basal that we manually put on to see if that would make a difference but it gives the same recommendation - no high-temp to cancel rather than recommending a low temp basal.
Luckily by blood his bg had already shot up but I think this is the case if someone goes low and stays low, openaps should be recommending a 0 temp basal the entire time no matter what the other metrics are saying