In the scene release world, a "PROPER" tag is used when a previous release by another group (or even the same group) had a noticeable flaw. For this specific episode:
The first WEBRip release of Episode 8 reportedly suffered from stuttering/frame drops during high-motion scenes and audio sync drift in the latter half of the episode. [3] Dangerous.Liaisons.S01E08.720p.WEBRip.mkv
The PROPER release uses a better capture method or a different source stream to ensure smooth playback and perfectly aligned audio. [4] 🛠️ Technical Specifications File Attribute Duration ~58 minutes Video Bitrate ~1100 - 1500 kbps Frame Rate 23.976 fps Size ~500 MB - 800 MB In the scene release world, a "PROPER" tag