Solana error code #-32002 - Transaction simulation failed

[Buidlor]

InvalidInstructionData (#15999) on Solana same-chain swaps via DFlow router

Started happening consistently around March 10. Was rare before that.

Solana same-chain swaps (memecoin → SOL) are failing during simulation with AnchorError #15999 InvalidInstructionData on DF1ow4tspfHX9JwWJsAb9epbkA8hmpSEAtxXy1V27QBH, instruction SwapWithDestination. Only happens when the quote routes through DFlow.

Forcing includedOriginSwapSources: ["jupiter"] avoids the error but breaks routing for most pump.fun tokens (NO_SWAP_ROUTES_FOUND), so not a real fix.

Quote payload:

{
  "user": "2P2fjvEqamcYe8MNFgCxKuth4ECr4zEAQAAtXhxdjFMp",
  "recipient": "2P2fjvEqamcYe8MNFgCxKuth4ECr4zEAQAAtXhxdjFMp",
  "originChainId": 792703809,
  "destinationChainId": 792703809,
  "originCurrency": "EPuZ1X6pPzac3ELPsT59LStmgaSr4kBJvaAbL15Fpump",
  "destinationCurrency": "11111111111111111111111111111111",
  "tradeType": "EXACT_INPUT",
  "amount": "803771314",
  "slippageTolerance": "1500",
  "appFees": [{ "recipient": "0x2AE4cd5346D327Df52EC964c25400DC78400a2A5", "fee": "100" }]
}

Route returned: { "origin": { "router": "dflow" }, "destination": { "router": "dflow" } }

Error logs:

Program DF1ow4tspfHX9JwWJsAb9epbkA8hmpSEAtxXy1V27QBH invoke [1]
Program log: Instruction: SwapWithDestination
Program log: AnchorError occurred. Error Code: InvalidInstructionData. Error Number: 15999.
Program DF1ow4tspfHX9JwWJsAb9epbkA8hmpSEAtxXy1V27QBH consumed 21272 of 803000 compute units
Program DF1ow4tspfHX9JwWJsAb9epbkA8hmpSEAtxXy1V27QBH failed: custom program error: 0x3e7f

Request ID: 0xed582bd71d2885a143bf39f596103700c7b4f7cee75e6430bc443b7a0f5b7cba

The instruction fails almost instantly (21k of 803k CU), so it looks like the instruction data is malformed rather than a liquidity/routing issue.

Was there a recent change to the DFlow integration or on-chain program around March 10? And is there any way the quote API could detect this and fall back to another router automatically?

Full logs attached here:

simulation-failed.txt