Sometimes taking a screenshot on Windows or mobile and then uploading it to Facebook can strip or corrupt the original metadata, leaving the platform to generate its own filename.
When decoded, these strings typically translate to a date and time. For example, "ЩўЩ ЩўЩўЩЎЩЎЩўЩҐ" likely represents (November 25, 2022). Facebook often generates these timestamps to help keep files unique when you download a photo . Why Does This Happen on Facebook? Sometimes taking a screenshot on Windows or mobile
Use Snipping Tool to capture screenshots - Microsoft Support Sometimes taking a screenshot on Windows or mobile