Track the device on which the setting changed
If one household member lowers Disney+ data use on a shared screen, another profile on that same screen may inherit the resulting viewing quality. Begin by noting the device and its app setting rather than changing the second profile’s language or password. The scope of a preference determines who can encounter it, even when each person has their own recommendations and Watchlist.
Read Disney+’s device-level explanation
Disney+ says data-usage settings are applied separately to each device but affect all profiles on that device. It also explains that lower data use reduces video quality. Its UK quality guidance describes different options for mobile devices, televisions and browsers, with audio quality also affected by the selected mode. A profile switch therefore is not a documented way to restore a shared device’s previous quality preference.
Compare a concrete household case
Suppose a television was set to Save data during a constrained connection, then a different viewer later notices a softer picture. Inspect that television’s App Settings and agree on a suitable data preference before changing it. A phone that still looks sharp does not contradict the television’s setting because the devices can hold different choices. Record the original mode if the household may need it again.
Verify quality without turning an upper limit into a guarantee
Return to the same programme and viewing position after an intentional setting change. Device capability, connection, title and plan can still limit the result, so selecting Automatic does not promise a particular resolution or audio format. If the issue remains, report the actual device mode and programme rather than saying every profile or every Disney+ device was tested.
Questions, answered
Does the setting apply to just one profile?
Disney+ describes it as applying to all profiles on the device where it is set.