The N3 has a slightly smaller 5.
In auto flash mode the flash tends to fire pointlessly on nightscapes, and the end results are somewhat underwhelming, with fairly dull exposures, seriously clipped highlights, course luminance noise, and that same yellowish color cast.
Retrieved 19 November 2020.
If the problem appears the same with the different wifi, then take your phone to the service center and get it fixed.
Related — TWRP File May Or May Not Be available as per the development After following the above steps, I am sure that you will not face it again.
The Oppo Find 7 is also available in another variant called the Find 7a, which has a 1080p screen and 2GB of RAM compared to the Find 7, which sports higher specs.