`valid` is sometimes true when it shouldn't be

[dmnd]

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It looks like under some circumstance we don't understand, the valid argument to the Form's render prop can report the wrong value. This caused type errors in Flexport's app because certain fields were assumed to be non-null when the form was valid.

See https://github.com/flexport/flexport/pull/41681 for an example internal to Flexport. There was a Sentry but it's expired 😢.