Unless the Cross Domain Consent Sharing (CDCS) function is activated, Usercentrics CMP supports newer versions of the Safari browser.
However, if the CDCS function is activated, it is possible that the initial layer (Privacy Banner / Wall) will be displayed again to a visitor when he switches between two (sub)domains - e.g. from www.abcd.com to shop.abcd.com. This will always be the case if the second (sub-)domain is opened in a new tab.
This is due to a Safari limitation, there is no way to circumvent this.