Preserve variables when using Timer Start Event

[dragoscalinescu]

I'm doing something pretty basic. I want to register a process to be executed in an infinite loop, while keeping the variables it received initially.

<process id="my-process" name="my-process" isExecutable="true">
 <startEvent id="startEvent" name="startEvent">
        <timerEventDefinition>
            <timeCycle>0 0/1 * * * ?</timeCycle>
        </timerEventDefinition>
 </startEvent>
 ...

I register this once:

runtimeService.startProcessInstanceByKey("my-process", Map.of("key", "value"));

The first run has the variable, but the subsequent runs do not.

Is there any way to keep the initial variables for all the process instances created by the timer start event? Or is there a workaround? Thank you!