New card limit doesn't increase

im using anki version ⁨23.12.1 (1a1d4d54)⁩ Python 3.9.15 Qt 6.6.1 PyQt 6.6.1
the problem is that i can’t increase the number of new cards in any of my decks. the max is 30 and the number just won’t go up (although i have more than new 30 cards to learn). however if the limit is 29 or 28 or 27 etc the number changes and it works perfectly.
any help would be appreciated

Are any of these decks inside other decks?

What are your settings for “New cards ignore review limit” and “Limits start from top”?
Screenshot_20240212-162148_kindlephoto-520149615