Caption position, player zoom and television overscan can each hide text. First confirm that the entire video frame is visible, then inspect subtitle size and position. A caption track can also contain its own placement instructions, so one programme may behave differently from another.
Check the picture boundary
Open the player interface and compare other channels. If menus and scoreboards are clipped too, fix the overall image sizing first. If only captions disappear while other edge details remain visible, investigate subtitle placement, line spacing and whether the player is applying a custom style or offset.
Reduce avoidable crowding
A very large font or thick outline can push several caption lines beyond a small display area. Reduce the size gradually and use a background box or contrasting outline for readability rather than increasing size indefinitely. Keep enough room for two lines without covering every face or important lower-third graphic.
Distinguish track faults from settings
Try another caption track or another authorised programme without changing the display. If only one track is misplaced, report the title, language and playback time. Avoid assuming every language version uses the same cue positioning. A temporary style override can help, but it should not be described as repairing the original caption file.