We released version 0.12.1 of #nheko! This release includes a few security fixes around html escaping into the UI and properly attaching a mark of the web on Windows. I highly recommend you upgrade!
This release also takes the first steps to room version 12 compatibility regarding the upcoming #matrix security release.
You can find the release here: 
Enjoy! :)
GitHub
Release v0.12.1 · Nheko-Reborn/nheko
Security
Fix html escaping in several locations.
Thank you, HarHarLinks, for the report.
Encode urls in tooltips to prevent confusion.
Thank y...