Test simultaneous viewing in the same household
Separate an account’s active-screen rule from a local network limit when a second television starts playback.
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Check the written active-screen allowance
Read the exact plan terms for simultaneous playback, device registrations and household restrictions. An account may let you register several devices while permitting fewer active streams. Confirm whether the second screen is permitted before testing.
Compare one screen and two screens under the same conditions
Start one authorized live feed and record how long it stays stable. Start a second permitted stream and note whether the first stops immediately with an account message or becomes intermittent. If both devices slow down without an account error, compare another app or a wired connection to see whether network load is part of the problem.
Keep the useful evidence
Note both devices, their network paths, the time and the exact on-screen message. If the issue occurs even at the permitted limit, send the result to the provider using the account's private support route.