Problems mixing @Variable and @VariablesAsType parameters in same signature

[theseventhwave]

When defining a @Jobworker, we find the following:

1. If all parameters are declared @variable --> values are passed correctly (e.g., foobar( @variable a, @variable b ))
2. If all parameters are declared @VariablesAsType --> values are passed correctly (e.g., foobar( @VariablesAsType a, @VariablesAsType b ) )
3. If some parameters are @variable and others @VariablesAsType --> @VariablesAsType values are missing (e.g., foobar( @variable a, @VariablesAsType b ) )

Looking closer, we see that as soon as a @variable parameter is used, all non-@variable (i.e., @VariablesAsType) parameters are missing from ActivatedJob: getVariablesAsMap() and getVariables() bear witness to this. Stepping through the code shows that this seems to happen fairly deep in the system; possibly even prior to spring-zeebe (not sure).

This is not a problem in the engine: all parameters are shown correctly in Operate.

Invoking getVariablesAsMap().get() and getVariablesAsType() does not trigger this behavior, so it must be something else.

The versions tested are:

Zeebe 8.1.8
Spring-Zeebe 8.2.0