Is Dynamic Time series still supported in FCC? (suddenly not working anymore)

Summary:

We noticed that for a new client they made use of DTS (Dynamic Time Series) in FCC, but it's suddenly not working anymore. Is DTS still supported in FCC (as I can't find any reference in the documentation)?

Content (please ensure you mask any confidential information):

Our customer has an existing FCC environment where they make use of Dynamic Time Series in certain reports (Q-T-D / Y-T-D). The reports using the DTS, suddenly stopped showing numbers for the Q-T-D and Y-T-D members. They say it worked before yesterday. Strange thing is that it doesn't work on any environment anymore. There were no changes made to the period or entity dimension.