'Invalid date' is displayed when adding a custom filter

### Please answer the following questions for yourself before submitting an issue

- [X] Filters were updated before reproducing an issue
- [X] I checked the [knowledge base](https://adguard.com/kb/) and found no answer
- [X] I checked to make sure that this issue has not already been filed

### AdGuard Extension version

4.3.53

### Browser version

Chrome 126

### OS version

Windows 11

### Ad Blocking

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### Privacy

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### Social

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### Annoyances

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### Security

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### Other

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### Language-specific

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### What Tracking protection options do you have enabled?

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### Issue Details

Steps to reproduce:
1. Go to custom filters section
2. Click `Add custom filter`
3. Subscribe to this filter https://raw.githubusercontent.com/alexx7311/custom-filter/main/filterdzen

Screenshot


### Expected Behavior

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### Actual Behavior

For the first 2 seconds 'Invalid date' will be displayed.

### Screenshots

Screenshot 1

### Additional Information

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