Element type change not recognized

[nikku]

Describe the Bug

As reported in https://github.com/bpmn-io/bpmn-js-differ/issues/22#issuecomment-2311988241 by @nithinssabu the linked PR likely introduced a bug where changes in element types are no longer recognized:

Before

    <bpmn:userTask id="Activity_0f5vdgx">
      <bpmn:incoming>Flow_1dqzfs7</bpmn:incoming>
      <bpmn:outgoing>Flow_099h4vv</bpmn:outgoing>
    </bpmn:userTask>

After

    <bpmn:task id="Activity_0f5vdgx">
      <bpmn:incoming>Flow_1dqzfs7</bpmn:incoming>
      <bpmn:outgoing>Flow_099h4vv</bpmn:outgoing>
    </bpmn:task>

Steps to Reproduce

1. Open playground
2. See changes count equals 0

Expected Behavior

• [ ] Element type change is recognized, i.e. in the example above #Activity_0f5vdgx changed

Environment

• Host (Browser/Node version), if applicable: Any
• OS: Any
• Library version: v3.0.0 (works in v2.x)

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Cf. downstream bug report.