Hikvision NVR stops recording soon after detecting motion (alarm bell shoes up and goes missing after few seconds)

[rebekic 0]

As i mention in headline... Motion is detected, yellow alarm bell shows up, starts to record, but after a second yellow bell is gone and recording continues to whatever is set up (30sec) and then stops, even though people are still moving in the frame.

 

The setup is:

NVR: DS-7608NI-E1 / A  (V3.4.98 build 171121)

Cameras: 4 x Panasonic WV - SF-539  (have one Hikvision camera...works ok)

 

Also additionl question: Hikvision camera that i have is DS-2CD2342WD-I (V5.5.82 build 190220).  It has the option "line crossing", is there a possibility to count people who crossed the line back ad forward (a<->b - in - out) and alert me when certain number (set) are reached. I need this for my Airbnb rental. If this camera can not do it, any other suggestion for this system (i also have face detection on this camera enabled but i can not seem to use it)