Missing Study Days in Calendar?

[warm star]

I’m unsure on how to title this, but recently I’ve been noticing a day or two of studying in my streak has disappeared.

The first one appeared on 20.10, and a second one on 01.11… I chalked the 20.10 day missing because of a time change since i recently travelled and changed the time on my phone, but I checked how my streak is doing today (I check everyday after I finish studying) and another day has been unmarked.

It’s a small issue, but the small dots on my calendar help me continue my studying. Any advice?

[opaque patrol]

The most common causes of this are changes to what constitutes a "day" in Anki -- due to changing time zones, seasonal time changes, or changing the next-day-starts time in your Anki Preferences.

Aside from that, anything that deletes review history could cause this.

If you click the boxes before/after those gaps -- you'll see what happened on those days, and that might give you some indication of what is happening.