How does the type of SSL certificate affect the position of the site in the search results?

Question

Search Engine Optimization

Good afternoon. The following question is of interest, does anyone have information about how changing the type of SSL certificate affects the position of the site in the issuance (Yandex is especially interested).
There is a certain site nnn.site on which an SSL certificate (GeoTrust RapidSSL) was installed. The site ranked from top 3 to top 15 in its region according to the control group of queries.
At some point in time, the SSL certificate was changed from GeoTrust RapidSSL to Let's Encrypt. Since then, the site's position began to decline and the control group shifted from the top 15 to the top 25. The fall occurred synchronously for all requests. The certificate change was quick and painless. The site was not broken.
Yandex support response: "There are no sanctions."
Reaction to events from Google: zero in phase. Positions in Google change plus/minus a couple of lines.
Hence the question, has anyone encountered a similar situation? Maybe someone saw the research related to the issue of changing the SSL certificate?

Answer 1

These questions have already been raised, but you probably came across hints - Does the certificate publisher affect the position in search engines?

Answer 2

When you change the certificate, it seems that reindexing occurs, doesn't it? Most likely a natural drawdown associated with this

Answer 3

It could potentially affect, but certainly not by that much. Of course, there is some comparison not in favor of LE, that it is free, and all the rest - for yuan :) But how many people look at the certificate publisher? If you don't feel sorry for the money to buy a paid certificate for a year - well, buy it, install a paid one and see what happens.