Why suddenly a long "wait for api-maps.yandex"?

Question

JavaScript

I just noticed that the site was taking a very long time to load.
I saw in chrome that he is thinking about api-maps.yandex
status: pending

Request URL: https://api-maps.yandex.ru/2.1/?lang=ru_RU
Request Headers
Provisional headers are shown

then 504 is thrown out.
Oddly enough, it's not on all pages. Which makes me think that somewhere I did something wrong. Although an hour ago everything worked, but no changes were made.
What could be the reason for this behavior?
Thanks to.

Answer 1

Maybe a daily limit?

Answer 2

If the problem is still relevant, please send a link to the page where the problem is reproduced, as well as your ip-address.