I started using ActivityFix for automatic file names of my Strava avtivities about 6-7 weeks ago. Since then I have experienced that my newest activities, every now and then, are missing from Intervals.icu. Sometimes they appear after some minutes, other times for several hours or maybe even the next morning.
I rarely, if ever, experienced this before I used ActivityFix (unless Intervals.icu had a «global» sync bug). Is it just a coincidence?
In ActivityFix there is something in settings called «Processing Delay». I have that on 10 secs, which is the lowest one. There is also 1, 5 or 15 mins. Maybe that has something to do with it?
Happened again evening time, Europe, July 22.