Hey Team,

I've been countering a strange issue--currently I'm working with support to try to figure it out, but we're hitting walls. 

I'll give the quick version first, and then more details below if you need it.

I have a super simple process builder: When a lead is converted, update a field on the contact it's converted into. However, I'm getting the error above.

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Details:

First off, every solution built in webdev seems to work; however, it does not work in product. We've done a sandbox refresh just in case, but the process still works in webdev, but not production.

I've narrowed things down as far as I can, and I think I've come to this root cause:

It's specifically the lead conversion. For instance, I decided to bypass the process builder and build out what I'm trying to do in a flow, so I can test some more. You'll see the image attached that the update process fails. All the update process does is reference the converted contact ID (pass through Process builder) to update that contact's field.

It fails--super simple, though. You can even see in the log that it does capture the ID. 

So, I decided to use the debug method in Flow and hardcode that ID into it, and the process works just fine. Which leads me to believe that the issue is with the ID being passed through the lead conversion.

But I can't think about what the issue may be in this instance.

Has anyone ever encountered this error before and has some experience troubleshooting it?

(Also, the PB is simply: When lead is created or edited; is it converted?; launch flow. While testing, I don't have any other Lead related PBs active).

Thanks,
Nick