Bug: Linking three portals into the shape of a triangle does not always create a field

Device: Pixel 4
OS: Android 10
App Version: 2.43.4
Approximate time: 2020-04-01 07:00 (UTC-5)
Approximate location: https://intel.ingress.com/intel?ll=43.072544,-89.391056&z=17&pll=43.07118,-89.38891
This is a story perhaps most easily told by the screenshots below and the three highlighted links; follow the Intel link above to confirm portal names, etc. At a time when I was the only active agent in the area, I would expect that linking three portals together into a triangle would create a field. Alas, the third link resulted in… nothing. No field in the scanner. No field on intel.
N.B. This is not a “zero field,” where portals were linked in the “wrong” order. Nothing was destroyed during this time.
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Approximate time: 2020-04-03 07:00 (UTC-5)
Approximate location: https://intel.ingress.com/intel?ll=43.069495,-89.386346&z=17&pll=43.06915,-89.385532
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This time, I was paying close attention to the scanner, expecting that something like this might happen again (how sad is that? expecting a basic game mechanic to fail…). The third link didn’t create a field; the AP I received was consistent with making only a link.
Interesting, such a bug might explain a recent observation of mine.
But I eventually got another field created there so cant provide data.