WebView produces a lot of garbage in cache

Apps using WebView (e.g.Jelly) are collecting a lot of garbage in their app_webview/BrowserMetrics directory, which never gets deleted. I just manually deleted several hundred MB in seveal apps. Installing AndroidSystemWebview Beta 87.0.4280.86 from Play Store solves the problem.

Same on osprey, probably a platform issue

Expected Behavior

Current Behavior

Possible Solution

Update internal WebView from 86.0.4240.198 to 87.0.4280.86

Steps to Reproduce

1. e.g open page in jelly
2. check BrowserMetrics directory in /data/data/org.lineageos.jelly/app_webview
3. kill Jelly
4. start Jelly again and open page
5. Every time a new file is created in BrowserMetrics and never deleted

/device harpia /version lineage-17.1 /date 2020-11-27 /kernel /baseband /mods

I have read the directions.