Why does Google Analytics count goals incorrectly?

Question

Google Analytics

There is an online service that runs contextual advertising.
For each event (Registration, Starting a task, Topping up the balance, Connecting a tariff), we put metric goals and Google analytics goals for conversion tracking in a similar way (on the final page).
There are no problems with Yandex Metrica, everything counts clearly
. But there are problems with Google Analitics, since the most basic events (Balance replenishment and Tariff activation) tap out incorrectly, namely, about 90% of conversions are lost somewhere
With intermediate events (Registration, Task launch and others) is fine.
Tell me how to solve the problem?