How often does the EPO issue summons for oral proceedings as a first action?

Due to the revisions in the Guidelines in 2018, the Examining Division of the EPO is now able to issue a summons for oral proceedings as a first office action (hereinafter also called as "OA") if:

– in its opinion, there is no prospect of a grant, even taking into account the applicant's reply to the search opinion;
– the content of the claims on file is not different in substance from that of the claims which served as a basis for the search, and
– one or more of the objections raised in the search opinion which are crucial to the outcome of the examination procedure still apply.

(GL C-III, 5)

It is however questionable, how often the Examining Division makes use of the summons as a first action in practice.

I have never experienced a case where summons have been issued as a first OA, nor have I heard of anyone else encountering such a case.

So I looked for cases where summons have been issued as a first OA by using so called EP Bulletin Search (https://data.epo.org/expert-services/index.html), a search tool provided by the EPO. After spending some time with the EP Bulletin Search,  I could finally find one case where summons have been issued as a first OA, i.e., European patent application EP3452931.

In view of the facts that we have rarely heard of a case in which summons have been issued as a first OA, and that I could find only one case after spending a certain amount of time with searching, it can be concluded that the Examining Division issues summons for the oral proceedings as a first OA extremely exceptionally.