Confirmed. OK for me too.
Many thanks for the speedy solution.
Sorted for me, thanks!
This has been fixed so should be working OK now.
Thanks for flagging that up - we'll get it fixed asap.
I confirm that, when in View mode. Selecting any map works OK other than the OS map, but once that is selected, problems start.
Two related problems:
When viewing a collection, I cannot select the Ordnance Survey option for my base map. (I'm a subscribing member and it works in other contexts.) I chick the option and nothing seems to happen.
However, if I then select a different map type, I get either a totally random location (unrelated to the collection) or a totally blank screen (perhaps a blank part of the map?)