This is normal. Like Chrome, TBS creates separate processes for each tab or webview embedded in Tencent apps.
It has been linked to system lock-ups, crashes, and Blue Screen of Death (BSOD) errors, specifically WHEA 18 (processor exceptions) due to aggressive hardware polling. tbs-browser exe
For the vast majority of users, (especially WeChat). It is not a virus, trojan, or rootkit. However, it is a resource-heavy Chromium embedder that runs without a visible window, which understandably alarms users who check their Task Manager. This is normal