Merging contacts

Please clarify according to the OS version - if Contact 1 had Events (email), I combined his card with the card of Contact 2. But email is not displayed in Events Example https://onebox.mim.kiev.ua/app/contact/34294/ - deleted its events https://onebox.mim.kiev.ua/app/event/?dumpHash=app-object-dump-475cb456bf4ed11c7bba07798e82b0c4&noFilter=1&objectsFromName =%D0%A1%D1%82%D0%BE%D1%8F%D1%86%D1%8C%D0%BA%D0%B8%D0%B9%20%D0%A1%D1%82%D0% B0%D0%BD%D1%96%D1%81%D0%BB%D0%B0%D0%B2 The one in which he combined - https://onebox.mim.kiev.ua/app/contact/37006/ https://onebox.mim.kiev.ua/app/event/?dumpHash=app-object-dump-8326d248bb670077468e7377d82e4fae&noFilter= 1&objectsFromName=%D0%A1%D1%82%D0%BE%D1%8F%D1%86%D1%8C%D0%BA%D0%B8%D0%B9%20%D0%A1%D1%82%D0 %B0%D0%BD%D1%96%D1%81%D0%BB%D0%B0%D0%B2%20%D0%9E%D0%BB%D0%B5%D0%BA%D1%81%D0 %B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B2%D0%B8%D1%87 Old events are not pulled up Is this a bug or something else?