Got several cancellations for Intra EU flights for early and late December, no email, no call, just found out by chance on the app. First ticket was on LH and rebooked it through the app, the second one for Xmass was on LX and it took me almost an hour to rebook it via LH app live chat, as I wanted specific combintion of flights. The agents there are very slow for everything, but good thing is that they allowed me to rebook also a return, hopefully they will reissue in 24-48 hrs.