DS(i) games not logged correctly in Activity Log

I’ve noticed that since switching to Pretendo servers about a month ago, my 3DS hasn’t been correctly logging DS/DSi software titles in the Activity Log. Titles show up with “0:00” as the playtime, regardless of how long I actually spent in the game. Sometimes DS/DSi software aren’t logged at all. Switching back to Nintendo servers fixes the problem. Only new entries are affected - the bug does not break old entries.