Some variables appear to lose assigned value in loop

Summary:

We have an integration which uses a loop variable as well as a schedule variable to read a lookup table.

Content (please ensure you mask any confidential information):

When executed in non-prod, this design works every time. When executed in the Production instance, it fails anywhere between the second and fifth loop because it cannot resolve the variable values.

Error during evaluation of XPath "dvm:lookupValue(concat("oramds:/apps/ICS/DVM/",$messagecontext_998,".dvm"),"InterfaceNumber",$messagecontext_134,"ObjectName","NO_DATA_FOUND")" unknown protocol: oramds

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Code Snippet (add any code snippets that support your topic, if applicable):