[bug]: additional + node loaded in a condition

### Describe the bug

### Steps To Reproduce
```
{
"label": "test2",
"description": "Out-of-hours Gmail auto-response with AI urgency triage + log to Google Sheets + create Asana task",
"inputs": [],
"triggers": [
{
"label": "New Email",
"name": "trigger_1",
"type": "googleMail/v1/newEmail",
"parameters": {
"topicName": "customer-inbox",
"format": "FULL"
}
}
],
"tasks": [
{
"label": "Outside working hours?",
"name": "condition_1",
"type": "condition/v1",
"parameters": {
"rawExpression": true,
"expression": "{{ !( (dayOfWeek(now) >= 1 && dayOfWeek(now) <= 5) && (hour(now) >= 9 && hour(now) < 17) ) }}",
"caseTrue": [
{
"label": "AI urgency classification",
"name": "openAi_1",
"type": "openAi/v1/ask",
"parameters": {
"model": "gpt-4o-mini",
"format": "SIMPLE",
"systemPrompt": "You classify incoming customer emails received outside working hours. Return ONLY JSON.",
"userPrompt": "Classify urgency for this email.\n\nSubject: {{trigger_1.subject}}\nFrom: {{trigger_1.from}}\nBody: {{trigger_1.bodyPlain}}\n\nReturn JSON with keys: urgent (boolean), reason (string), suggested_reply (string).",
"response": {
"responseFormat": "JSON",
"responseSchema": "{\n \"type\": \"object\",\n \"properties\": {\n \"urgent\": {\"type\": \"boolean\"},\n \"reason\": {\"type\": \"string\"},\n \"suggested_reply\": {\"type\": \"string\"}\n },\n \"required\": [\"urgent\", \"reason\", \"suggested_reply\"]\n}"
}
}
},
{
"label": "Log to Google Sheets",
"name": "googleSheets_1",
"type": "googleSheets/v1/insertRow",
"parameters": {
"spreadsheetId": "SPREADSHEET_ID",
"sheetName": "FollowUps",
"valueInputOption": "RAW",
"isTheFirstRowHeader": true,
"row": {
"Timestamp": "{{now}}",
"From": "{{trigger_1.from}}",
"Subject": "{{trigger_1.subject}}",
"Urgent": "{{openAi_1.response.urgent}}",
"Reason": "{{openAi_1.response.reason}}",
"MessageId": "{{trigger_1.id}}"
}
}
},
{
"label": "Create Asana task",
"name": "asana_1",
"type": "asana/v1/createTask",
"parameters": {
"data": {
"workspace": "ASANA_WORKSPACE_ID",
"project": "ASANA_PROJECT_ID",
"name": "{{openAi_1.response.urgent ? '[URGENT] ' : ''}}{{trigger_1.subject}}",
"notes": "From: {{trigger_1.from}}\nMessageId: {{trigger_1.id}}\n\nReason: {{openAi_1.response.reason}}\n\nBody:\n{{trigger_1.bodyPlain}}"
}
}
},
{
"label": "Urgent?",
"name": "condition_2",
"type": "condition/v1",
"parameters": {
"rawExpression": true,
"expression": "{{openAi_1.response.urgent}}",
"caseTrue": [
{
"label": "(Urgent) Reply acknowledging escalation",
"name": "googleMail_2",
"type": "googleMail/v1/replyToEmail",
"parameters": {
"id": "{{trigger_1.id}}",
"to": [
"{{trigger_1.from}}"
],
"bodyType": "plain",
"body": "Thanks for your message. This looks urgent, and we’ve alerted a human who will follow up as soon as possible.\n\n— Automated response"
}
}
],
"caseFalse": [
{
"label": "(Not urgent) Auto-reply",
"name": "googleMail_3",
"type": "googleMail/v1/replyToEmail",
"parameters": {
"id": "{{trigger_1.id}}",
"to": [
"{{trigger_1.from}}"
],
"bodyType": "plain",
"body": "{{openAi_1.response.suggested_reply}}"
}
}
]
}
}
],
"caseFalse": []
},
"metadata": {
"ui": {
"dynamicPropertyTypes": {}
}
}
}
]
}
```

### Expected behavior

it shouldn't do that

### Version

latest

### OS

ubuntu

### Browser

_No response_

### Additional context

_No response_

No source file, test, or entry point is named. First reproduce the workflow from the supplied JSON and identify when the additional node appears or fails to load under the condition; then trace the condition task-loading path. Done means the workflow loads only the intended nodes and a regression test covers this case.

Written by the indexing model from the issue text.