Probably related – looks like 4 have reviewed their offerings. This from freesat:
We’re sorry to announce that All 4 and 4HD will be leaving Freesat on Thursday 22nd February, 2018.
Channel 4 is still available in standard definition, but any recordings you have scheduled for 4HD will need to be re-set in SD (via channel 104).
E4, More 4, 4seven and Film4 remain unaffected and can be accessed via the TV guide as usual, but the rollback guide and catch-up TV for all of the Channel 4 channels will no longer be available via your Freesat box.
If you have any questions about these changes please read our Q&A here, and to find out where else you can watch All 4 please visit all4.com/how-to-watch