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About half the time recently when printing with PLA, I see that holes or loops have a line of filament running approximately through the middle which seems to be one of the inner perimeters having detached and contracted, but is still attached on both sides. Is it a temperature thing, an extrusion thing? I can't find a pattern. Bed adhesion is great. Bambu H2C, mostly printing with Bambu Basic PLA.
You're sure it's the first layer as well as others? The print bed side looks pretty cleanly pressed against the build plate, it seems unlikely you'd have issues unless there is some major deviations in your bed leveling. It mostly looks like the gcode had it try to print in the air/with nothing for it to stick on.
As others have pointed out this is pretty common for inner circles and you may have to find a way to tweak the print settings or the design to be more printable. You can look through the preview layer by layer and check the tooling path for anything that would obviously not work.
That being said, if you'd like to share the 3mf file I wouldn't mind poking at it later... 3mf is what Bambu slicer uses isn't it?