Salesforce - tSalesforceInput not able to get some fields in TOS 6.3.0

[Anonymous]

Hello,
I'm doing an upgrade of my TOS jobs that are connecting to SFDC (since SFDC will not allow connection using TLS 1.0 from March 2017). I think that I have identify a regression on that tSalesforceInput component.
I migrated my whole project from TOS 5.6.2 to TOS 6.3.0 and ran them, just to make sure everything is fine.
All of them are running fine exepting 2 that are querying Task and LiveAgentSession objects. When the job is reaching the tSalesforceInput component, it crashes and throw that error message: 

stateMessage='InvalidBatch : Failed to process query: INVALID_FIELD:  NumFlagLoweredAgent^ ERROR at Row:1:Column:175 No such column 'NumFlagLoweredAgent' on entity 'LiveAgentSession'

So far, I have identified that it is occuring for the following fields:
>  NumFlagLoweredAgent on  LiveAgentSession object
> TaskSubType on Task object
That error message is usually thrown when you try to query a new standard field and you are not running on the last API version. This not the case here since I am running on API 37.0. I evidently checked the field level security on this field in SFDC, and I can see the fields. I also run the very same query both in Workbench and Force.CLI, using the bulk mode, I am able to get a file.
Another proof that leads to me to a regression, is that the very same job, works fine on TOS 5.6.2 while it crashes on TOS 6.3.0. 
Here is a set of screenshot to illustrate the following.
Working tSalesforceInput - TOS 5.6.2

Crashing tSalesforceInput - TOS 6.3.0 and 6.2.1

Am I the only one to face that issue?
Does anyone already patched that?
Thanks,
Michel

[Anonymous]

Hello,
Here a quick update, I have identified that following fields on  LiveAgentSession object are not accessible through the tSalesforceInput:

NumFlagLoweredAgent
NumFlagLoweredSupervisor
NumFlagRaised

In order to not freeze the upgrade I'm performing now, I will just blank these fields.
Michel