Google. Why does sync across devices and the same account display different data?

Question

Google

The broken-down Samsung S8 phone is on. synchronization! There are 236 contacts in total. It is displayed as: on SIM cards and in the phone's memory, as well as on the flash drive, it is empty, but these contacts in this phone are synchronized with a Google account - in .... @gmail.com 236 contacts.
I go to google.ru on my computer, and there are 52 contacts.
In the recently purchased Samsung A51, I synchronize the data, and, again, 52 contacts.
The day before yesterday I logged into the account on the new A51 phone into the account from the Chrome browser. 45 more contacts arrive today!
And today the picture is as follows:
- in a broken phone S8 - 236 contacts;
- in the new phone A51 - 97 contacts;
- on the computer in the browser, as it was 52, it remains!

Tsuka, how does it work? Why different data? Where did the other 45 come from?