checking for the ability to merge automatically broke

I had a stack of two PRs and i managed to get the first PR closed and tried to rebase the stack. I got this:

x-github-request-id: D183:D8B6E:27991D:364B7D:6A591DD1

```json
{
"state": "UNKNOWN",
"channels": {
"stateChannel": "eyJjIjoiaXNzdWU6NDg5NjIwMDUxMjpzdGF0ZSIsInQiOjE3ODQyMjUyMzN9--e4ae28e21e625aca8871908842f8520fbbd75aa64469510d00542498cd7c94ff",
"deployedChannel": "eyJjIjoicHVsbF9yZXF1ZXN0OjQwNjM2MDY3NjI6ZGVwbG95ZWQiLCJ0IjoxNzg0MjI1MjMzfQ==--22226205d2969cd11420e654205e2c588db43df1abccdee0640ab94867650ee7",
"reviewStateChannel": "eyJjIjoicHVsbF9yZXF1ZXN0OjQwNjM2MDY3NjI6cmV2aWV3X3N0YXRlIiwidCI6MTc4NDIyNTIzM30=--6bc7326e494154238fa723ac9917986a79fad7da1417344a651b613263c4fd0a",
"workflowsChannel": "eyJjIjoicHVsbF9yZXF1ZXN0OjQwNjM2MDY3NjI6d29ya2Zsb3dfcnVuIiwidCI6MTc4NDIyNTIzM30=--f144b40788e76d198b357fbbf4b33152738bd4cdedd841419f2d89a8bb14a0b8",
"codeScanningChannel": "eyJjIjoicHVsbF9yZXF1ZXN0OjQwNjM2MDY3NjI6Y29kZV9zY2FubmluZyIsInQiOjE3ODQyMjUyMzN9--6b1336644d79b6a24969cd771f0e4e736ad47a049a864ecb8bb40245e1da5e4a",
"mergeQueueChannel": "eyJjIjoicHVsbF9yZXF1ZXN0OjQwNjM2MDY3NjI6bWVyZ2VfcXVldWVfZW50cnlfc3RhdGUiLCJ0IjoxNzg0MjI1MjMzfQ==--f0e7d6f1cfa94bcc99670d37348ef5b9977e87f32eb7a8996806e46019f44fcd",
"headRefChannel": "eyJjIjoicmVwbzoxMzAyMDIzNDg3OmJyYW5jaDpqc29yZWYtcGF0Y2gtMiIsInQiOjE3ODQyMjUyMzN9--5de202b90fac8d6b85204ee7f567a8688d69ea1d8de2c0b9e8f314ba8e66ee65",
"baseRefChannel": "eyJjIjoicmVwbzoxMzAyMDIzNDg3OmJyYW5jaDpqc29yZWYtcGF0Y2gtMSIsInQiOjE3ODQyMjUyMzN9--c87562f3873f27c5bc77ab9969e158ad588171987323dfb0ff95c4477c7f2031",
"gitMergeStateChannel": "eyJjIjoicHVsbF9yZXF1ZXN0OjQwNjM2MDY3NjI6Z2l0X21lcmdlX3N0YXRlIiwidCI6MTc4NDIyNTIzM30=--4eb253765555a7448cfeb61b9fcc29e982363866d4709d5bb0d68426b18703b0",
"pullRequestChannel": "eyJjIjoicHVsbF9yZXF1ZXN0OjQwNjM2MDY3NjIiLCJ0IjoxNzg0MjI1MjMzfQ==--09dde74b381b1afc30cd7fa42cb9410f3ee04b30f81db536b21166f66fff516b"
},
"statusCheckChannels": {
"commitHeadShaChannel": "eyJjIjoicmVwbzoxMzAyMDIzNDg3OmNvbW1pdDpjY2I3NDc2NzY4NzkxYjU0ZDdiZTg0YjMyNDEzNGY1OTZhNzAwNTgyIiwidCI6MTc4NDIyNTIzM30=--7368aa09f2c20b801546d00da4d3323153c6f275de4300500b09ed35493ea381"
},
"effectiveEntryStatus": "LOADING"
}
```

Nenhum arquivo de origem ou teste foi indicado. Comece reproduzindo o rebase do stacked-PR após fechar o primeiro pull request e, em seguida, acompanhe a verificação da possibilidade de merge automático e o tratamento dos estados UNKNOWN e LOADING reportados. Está concluído quando o rebase reportar corretamente o estado de mergeability em vez de permanecer travado nesta resposta.

Escrita pelo modelo de indexação a partir do texto da issue.