I've been coming in every 9 - 10 weeks but only staying 3 weeks throughout the year and stay 6 weeks at Xmas . Never been questioned . I've been doing this since late 2021 . Maybe it's the duration of stay ..
I go visa exemption every 2 months from Australia and only ever stay a maximum of 3 to 6 weeks depending on when in the year. . Ive been doing this since 2022 . Never been asked ever