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caelas17

Camera Model: Sony A7S III (ILCE-7SM3)
Serial Number: 4471075
Firmware Version: 4.00
Lenses Used:

Memory Cards Used:

Recording Stops Randomly
- When recording in standard 25p XAVC S or 24p XAVC HS, recording stops unpredictably.
- This occurs after only a few seconds or within the first minute.
- Happens regardless of which V60 SDXC II card is used.
- Camera is set to record to Slot 1 only, simultaneous recording disabled.
- Auto Power OFF Temp set to High.
Mode Switching Bug
- When switching to Movie Mode using the mode dial (including custom modes C1–C3), the camera often reverts to Photo Mode instead or cycles back and forth indefinitely until I take the battery out.
- This makes custom video setups unreliable and forces manual reconfiguration.
- Issue occurs even after a full factory reset.
Straight Movie Mode Unstable
- Even when not using C1–C3, simply switching to Movie Mode on the dial is unstable.
- Recording sometimes stops after switching into this mode or it switches to photo mode (sometimes the Auto photo mode gets enables with the i and green camera icon). This happens when the dial is nowhere near auto mode!

Full factory reset performed (issues persist).
Multiple SDXC II V60 cards tested (Sony + Lexar, confirmed healthy and formatted in-camera).
Tried both lenses listed above.
Disabled simultaneous recording.
Auto Power OFF Temp set to High.
Verified that card write speed is not the bottleneck (recording mainly 25p).

Recording should continue reliably in 25p modes when using supported media.
Switching to Movie Mode or using C1–C3 custom positions should not revert to Photo Mode.

Recording stops at random within seconds to a minute.
Mode switching is unreliable and often jumps to Photo Mode.
Occurs regardless of lens or media used.
Problems have all occurred since upgrading from 2.11 (camera was incredibly stable on 2.11. Since 3.0-4.0 the camera has been unusable.