Sometimes even layer height can affect bridge behaviour.
But first thing I’d do is to rotate the piece by 90° on the bed and see if the thin bridges that you can see behind the thick curved ones, change their orientation to be short instead of long.
And then try to figure out what makes those thick curved bridges happen.
I would go back to your CAD model and tweak it for better printability. If it was a model you downloaded and without a source CAD model I would just remodel it myself to be more printable.
It looks to me like that’s not a flat area. That’s why it’s not using parallel lines. If you want good bridging it must be flat.
This is the answer.
Alternatively, use supports.
See if you can change the number of bottom layers or the bottom layer pattern to get a different result.
Honestly, I just keep changing all sorts of bridge related and unrelated settings until it does what I want. Maybe the piece lends itself to being printed on the head or on it’s edge (45° tilt) like this: https://www.reddit.com/r/3Dprinting/comments/mhcvut/pro_tip_if_youve_got_a_complex_part_youd_like_to/
Sometimes even layer height can affect bridge behaviour.
But first thing I’d do is to rotate the piece by 90° on the bed and see if the thin bridges that you can see behind the thick curved ones, change their orientation to be short instead of long.
And then try to figure out what makes those thick curved bridges happen.
I would go back to your CAD model and tweak it for better printability. If it was a model you downloaded and without a source CAD model I would just remodel it myself to be more printable.