Underrun error on COMPLETED_ORDER: End of message reached. Please report to https://github.com/stoqey/ib - code: 505 - reqId: -1

[icocoding]

ib/src/core/io/decoder.ts

Line 451 in d521e2a

readStr(): string {

In IB Gateway 10.19, an error occurred in orderDecoder.readShareholder() because the string has ended.

In the Decoder.readStr() method, if the string is no longer available, it should not throw an exception; instead, it should return null or an empty string.
Additionally, in the Decoder.readBool() method, it should return a default value if the boolean is not available.

[LimePixel]

``I have also received this error on IB Gateway 10.19.

EDIT: It has started happening since the 29/10/2024 and hasn't stopped.
In my case what appears to be happening is an extra field has been added to the message received by the COMPLETED_ORDER API. My orders usually have combo legs on the contract so this extra field pushes everything up:
;;;731155060|1,732397574|-1,732829836|-1,734264089|1;4;731155060

ib/src/core/io/decoder.ts

Line 3081 in d521e2a

this.contract.comboLegsDescription = this.decoder.readStr();

This causes the comboLegsDescription to be blank and the next field comboLegsCount to be the description.

ib/src/core/io/decoder.ts

Line 3085 in d521e2a

const comboLegsCount = this.decoder.readInt();

It decodes it as 731155060 and therefore expects to find 731155060 comboLegs. This causes the appearance of an UnderrunError.
To get everything working again I updated line 3081:
this.contract.comboLegsDescription = this.decoder.readStr() || this.decoder.readStr();
which fixed the comboLegsDescription and got things running again.
I would love to work out why this has started happening and what could possibly have caused it. Is there a way to check if there have been updates on IB's side?