Disappearing Contact Information

Ever since the airline fiasco, I and many others have been experiencing the loss of contact information and disappearing calendar information. Contacts I have had for decades suddenly disappear. Phone numbers, email addresses, and/or the entire contact. It is not our devices as it is happening on Apple and androids. It is occurring on PC's and Macs. This is getting frustrating and aggravating. Important contact information keeps disappearing. I have had to re-enter information on family members, work associates, golf teams, etc. Someone had better look into this. Microsoft is getting an awful reputation.