@indutny-wani I just released a userscript called WaniKani Review Analytics that adds exactly this kind of SRS performance tracking to your dashboard.
It includes a radar chart showing accuracy per SRS stage (Apprentice 1 through Enlighten), daily/weekly accuracy trends, item type breakdown, and summary stats. It uses Chart.js with data fetched via WKOF.
It might help you identify which SRS stages are causing those loops you mentioned.
Install: WaniKani Review Analytics
Forum thread with details: [Userscript] WaniKani Review Analytics — Track your accuracy over time with charts
GitHub: bimapopo345 (Bima Prawang Saputra) · GitHub