Erroneous "road can't get easier in akrasia horizon" message in road editor


#1

I have an integery goal on a daily rate whose road looks like this (showing only the relevant final lines of the road editor):

When I try to increase the rate to 1 per day — either like this:


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or like this:

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then the road editor tells me it can’t make the change, because the road can’t get easier in the akrasia horizon. But as you can see, a rate of 1 per day is vastly greater than the rate that kicks in on 2017-08-22 (which is taking me to a total value of 89 by 2017-12-31, and is thus something close to (89 - 75.86) / 130 ≈ 0.1 per day):


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So what’s going wrong?