MC-754 does seem to be a similar issue. Someone commented on that thread that restarting the server would 'fix' the issue - restarting the server DID make the white player marker appear once more on my own map (which was part of my problem), but the green item frame marker was also still on it as seen in the original picture.
MC-754 does seem to be a similar issue. Someone commented on that thread that restarting the server would 'fix' the issue - restarting the server DID make the white player marker appear once more on my own map (which was part of my problem), but the green item frame marker was also still on it as seen in the original picture.