OnePlus held an "Open Ears Forum" in New York, basically a meet-up to hear out fans on their thoughts and ideas of how the company can improve current and future OnePlus products - this specific one focused on the video capture. After some consideration, the company published a to-do list. Its first priority is to make exposure, color and white balance consistent across the three cameras (main, ultra wide and tele). This will enable future changes like "lens feature-parity" - support 4K video on all three cams and enable switching between them during recording. Also, recording with two...
Source: https://www.gsmarena.com/oneplus_hears_out_fans_lays_out_plan_to_upgrade_the_current_and_future_cameras_on_its_phones-news-41219.php