what would you do if your AE just got promoted to VP after losing you the customer?

i'm the SE on the deal everyone celebrated when the AE closed it in Q4, even though i'd only been in 2 of the 6 discovery calls and the AE handled the rest solo.

now we're 4 months into implementation, the renewal's 7 months out, and the customer's started raising things they thought we'd committed to in the sales cycle.

specifically, the champion has gotten colder, weekly calls have gotten quiet, and last week their VP wrote in a thread that they thought feature X would ship by EOQ, so i sat down and listened to the original calls.

after spending most of last night going through them, i pulled the recordings off our system, fed them to Otter for clean transcripts, ran BuildBetter against the calls to flag anywhere the AE said anything that sounded like a promise, and piled the matches into a Notion table next to the handoff doc.

by the end of the night i had 8 promises in the recordings against 2 in the handoff doc, and 4 of the missing 6 are the things the customer is angry about right now, with the other 2 likely to come up in the next month.

to make it worse, the AE just got promoted to VP, which means any escalation now lands on his desk.

so if i raise this it just becomes my problem, customer got excited or i should have been in more calls or whatever spin the AE wants, and either way i lose the account.

right now i'm eating it, building what was promised on my own time, hoping the customer renews and forgets the rest.

am i crazy for handling it this way?