Advice, Video AI is making birds in a beach scene partially disapear

Hi all,
I’m a noob to video as I mainly do photos.
I just upgraded with the black friday sale (thanks Topas, this is the only way I can afford your products) and got the package with video AI to encourage me to get into video more.
Its probably the settings or something simple, im just trying a few test videos at the moment, but I have a 4k video of a simple calm, bright beach scene, after running it through the app, I notice at times some of the seagulls (that are very small in the video against blue water/background) are being removed in the side by side comparison.
Currently trying - stabilization, motion deblur and enhancement (auto). Input and output are the same, most other settings are on auto.
The original video was pretty clear and not jittery, I can barely see any real difference, but I’m not really surprised.

It also took ~ 5 hours although that was on my laptop, ill see how my desktop goes. Ill also watch the dreaded tutorials. (OK, I know I should have done that first)

Suggestions please?
TIA.
Mark