Support required. 502 Server Error after upgrading to v8.7.2

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Hey guys, i just upgraded my cardano node from version v8.0.0 to version v8.7.2. I also upgraded Omgios from version v5.5.7-v2 to version v6.0.3 and the config files as provided by cardano book. I am running graphql version v8.0.0 and db-sync version v13.1.1.3. Although, my node has caught up to the latest block i am having issues accessing some api’s from graphql.

When i try to submit a transaction

curl 'https://xxx.node.xxx.com/cardano/testnet/v1/graphql/' -H 'Accept-Encoding: gzip, deflate, br' -H 'Content-Type: application/json' -H 'Accept: application/json' -H 'Connection: keep-alive' -H 'DNT: 1' -H 'Origin: https://xxxx.node.xxxx.com' --data-binary '{"query":"# Write your query or mutation here\nmutation submitTransaction($transaction: String!) {\n    submitTransaction(transaction: $transaction) {\n        hash\n    }\n}","variables":{"transaction":"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"}}' --compressed

When submititing to node running v8.0.0, I get a valid response

{"errors":[{"message":"Invalid Transaction","locations":[{"line":3,"column":5}],"path":["submitTransaction"],"extensions":{"reasons":[{"name":"ExtraScriptWitnessesError","details":["04444e126ba0fa9fe2471e2afafee50b0d44b044d9677366c26f64b7"]},{"name":"ValueNotConservedError","details":{"consumed":{"coins":0,"assets":{}},"produced":{"coins":1363688593,"assets":{}}}},{"name":"BadInputsError","details":[{"txId":"2ceadef9fa55d16fdc5cb53f6a1cbf7b72e0ff2805fecb5693cdc7b899fa5268","index":25},{"txId":"5ee77cca64ec31f7c90b566e6310c10e79eca96cf6c2717bd374527b46509e02","index":1}]}],"code":"BAD_REQUEST","exception":{"stacktrace":["Error: Invalid Transaction","    at Object.<anonymous> (/app/packages/api-cardano-db-hasura/dist/executableSchema.js:70:43)","    at Generator.throw (<anonymous>)","    at rejected (/app/packages/api-cardano-db-hasura/dist/executableSchema.js:6:65)","    at runMicrotasks (<anonymous>)","    at processTicksAndRejections (internal/process/task_queues.js:95:5)"]}}}],"data":null}

While when i submit the same transaction to the node running 8.7.2, I get

<html><head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>502 Server Error</title>
</head>
<body text=#000000 bgcolor=#ffffff>
<h1>Error: Server Error</h1>
<h2>The server encountered a temporary error and could not complete your request.<p>Please try again in 30 seconds.</h2>
<h2></h2>
</body></html>

My logs are completely clean, I cannot find anything in the node logs. Any clue what could be the reason behing it? Any help is highly appreciated.

Thanks a million.

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