iframe , google map

Hi,

I include iframe (google map) in custom tab, it works in backend.
In web page, it take a long time to load occasionally. I check in chrome > development tools, it shows:
A cookie associated with a cross-site resource at https://google.com/ was set without the SameSite attribute. It has been blocked, as Chrome now only delivers cookies with cross-site requests if they are set with SameSite=None and Secure. You can review cookies in developer tools under Application>Storage>Cookies and see more details at https://www.chromestatus.com/feature/5088147346030592 and https://www.chromestatus.com/feature/5633521622188032.

Any idea how to fix it?