WhatsApp and Threema Problems with CM12.1 Official

Hi, I have yesterday the new CyanogenMod 12.1 (cm-12.1-20150729-NIGHTLY-i9100.zip, previously CM11) installed. Everything without problems. It's going great. Only WhatsApp and threema can not send or receive in the mobile data network. With WLAN it works. Do you have any ideas?

Thanks in advance

Samsung Galaxy S2, I9100