Connection issues with CC printer(V1.1.46) and ElegooSlicer 1.2.0.18

Connection with the printer works sometimes, and uploading G-Code, never.

No video, GUI says "connected" and "Offline"

<img width="610" height="609" alt="Image" src="https://github.com/user-attachments/assets/5dfe8be5-9a27-4f03-9679-1042501aab36" />

<img width="1087" height="696" alt="Image" src="https://github.com/user-attachments/assets/7f6ecb92-0023-430a-aff0-12adcf6cfb13" />