Scenes differ in complexity, source material and production style. An encoder may need more data for movement, grain or fine texture, while a programme can also switch between cameras or archive clips. A change at a cut does not automatically mean the player or subscription has changed settings.
Compare the scene demands
A presenter against a plain background is easier to encode than a moving crowd or rainstorm. Dark noise and film grain can also be demanding. If the picture becomes blocky only in those moments, the encoding may be struggling with complexity rather than the television suddenly losing resolution.
Look for other changes
An adaptive player can change rendition when delivery conditions change, but that is not the only explanation. Note any visible resolution indicator, spinner or sound interruption. A change in colour or sharpness limited to an archive insert may simply reflect a different original source within the programme.
Report the exact passage
Give the programme and approximate time, and describe the visible difference between the scenes. If replaying the same passage reproduces the same artefact, include that observation. Avoid changing picture controls for every cut; a stable baseline makes source differences easier to identify and prevents one scene’s correction from damaging the next.