After upgrading servers 31-5-2020 all seemed to work well.
We only realized yesterday that the callhome requests from esp8266 devices using the old library were not comming in.
This was due to the ancient TLS_RSA_WITH_AES_128_CBC_SHA cipher not being supported by our new server.
We added support for this and will recommend users to upgrade their esp core libraries in the near future.
If your devices were affected our apologies for the inconvenience.