TRInvictus
I use nova free on P6a as well for over a year now with gestures and it works fine (Its worked the same regardless of android version), except one caveat.
I too started experiencing navigation issues. The swipe for home screen pages sometimes would start to jump erratically and incorrectly, and things would get worse pretty quickly. The swipe up would stop working and eventually the phone interface would be mostly frozen and i wouldn't be able to reach the app drawer or click on any home page icons, app switching not working, couldn't reach settings to restart apps.
At first i though phone had crashed, so I'd restart it and it got fixed. But eventually I realized the phone is still working and the notification swipe down is working fine. Then from the notification bar i found the settings icon and entered settings which worked just fine and decides to force stop "nova" app and restart it. Voila, the problem solved.
It was only the nova app that was crashing not anything else. Restarting it fixed the issue temporarily.
This issue doesn't happen too often. It either doesn't happen at all or when it happens it quickly escalates to a full freeze. This may happen for me once or twice a month.
Interestingly enough in the first 5-6 months this never happened. And i don't think I've seen it since the android 14 update. But who knows it might come around.
My nova free version is 7.0.58. From aurora.
Try restart the launcher see what happens. It's not a cure, but it might be a good enough temp fix for you.
I wouldn't switch back to the default launcher despite this hickup. I don't like the default icon colors and shape and size at all. Nova experience is faaaar better, esthetically.