Bug during the import of certificates

If I import a certificate file, only ONE certificate is imported. But I have files with many certificates in it (e.g. export all certificates of one account), that can not be handled by eM Client. Is this a bug?

do you receive any errors during the import?
Also what kind of certificates are you importing?

Thank you, I’m sorry for the very late reply,

No errors, but only one certificate is imported. Personal Certificates with public and private key, from a .p12 file. Exported by Firefox/Thunderbird.

I’m not sure if I understand the issue correctly, are you importing more certificates at once or are you importing one after another and only the first one has been imported?

Thank you,