Incoming data partially not normalized when matching a fuzzy possibleType and selected on a fragment when nullable field is null

[alessbell]

Issue Description

Bug was initially repoted on #10639, see linked PR with failing test case for full reproduction.

So far it seems to make this bug pop up you need to:

• configure fuzzy possibleTypes
• have a subtype request a nullable field via a fragment
• that field returns null
• some of the incoming data is no longer properly normalized

Interestingly, it fails to normalize whichever subtype appears second in the array in this case.

Link to Reproduction

#11521

Reproduction Steps

No response

@apollo/client version

3.8.10