From Canon Marketing Japan Inc. (translated):
To customers using the continuous recording function for professional video cameras and digital cinema cameras
Thank you for using Canon products.
We have found that the following phenomenon rarely occurs in the professional video camera "XF605" under specific usage conditions. We have also confirmed the possibility of this phenomenon occurring in the EOS C70 and EOS R5 C digital cinema cameras equipped with the same functions. There have been no reports of this phenomenon occurring with the EOS C70 and EOS R5 C.
We sincerely apologize for any inconvenience and concern caused to customers using this product. In the future, we will continue to implement thorough quality control so that our customers can use our products with peace of mind. Thank you for your understanding.
Repeatedly starting and stopping normal recording while the constant recording function is set may occasionally cause the camera to become inoperable. In addition, it has been confirmed that phenomena such as "FAN error" display and media access lamp blinking may occur at the same time as the operation becomes impossible.
* This phenomenon does not occur if the constant recording function is not set.
The constant recording function is a function that can be set only when MP4 is selected as the main recording setting, and constantly records images on one SD card without interlocking the REC switch. Products
Professional video camera "XF605": Products whose serial number has a "2" or earlier in the seventh digit from the left
* The digital cinema cameras "EOS C70" and "EOS R5 C" that may cause this phenomenon are as follows.
"EOS C70": Products with firmware version 188.8.131.52 or earlier
"EOS R5 C": Products with firmware version 184.108.40.206 or earlier
We apologize for the inconvenience, but please download the latest XF605 firmware and update it.
In addition, we are preparing to release firmware that corrects the above phenomenon for the two models of digital cinema cameras.