new additional camera issues

[mobilevox]

I have an existing Amcrest Eco-Series 720P HD Over Analog (HDCVI) 8CH with 4 bullet cameras. I bought a different 720P camera but then I connect it to the DVR, it either just flickers or if it stay connected, it's not in color. I used the same new camera on another DVR system and it works fine and in color. Used different cables but the issue is still there. Has anyone having the same issue/s?

[Stubear]

Yup I get exactly the same issue where the recording from Amcrest cloud flickers and so does the live Cam over Wi Fi.
Not sure but it seems to be related to the automatic exposure system as it does not occur all day.
Checked the firmware and it appears to be current. No real idea as to the cause.
Its pretty annoying