Thanks for your feedback and please accept our apologies for the inconvenience here. You can install the http://downloads.devexpress.com/Share/XAF/S31714/DevExpressComponents-126.96.36.19990.exe hot fix build that returns things back to normal. If you happen to experience any related problems, please report them to us. You can also temporarily disable this feature as described at the end of the UI - Disable server side operations (sorting, filtering, grouping, field chooser in the filter control, etc.) or provide warnings for non-persistent properties by default thread.
Filter Editor - Collections that represent ends of the many-to-many association are missing in the property list