Signals Notebook: I can't find a field in the Advanced search filter drop-down list but it's available by typing it. Is it as expected

I can't find my custom field in Advanced search filter drop-down list but i can find it by typing it. Is it as expected?

Answer:

Yes, it is as expected. Signals has limitation to 100 items to be displayed in search filter drop-down list, but you can find it by typing the exact name.