Strange camera (yanking) behaviour

Made a mistake posting this in this forum. Can you (moderator), please, move it to where it should be?

UPD: I have reposted it in MS FSX forum by myself.

Hello avsim.net community.

I have a problem with camera switch. To be short: when I press "S" using default camera, views are being switched with a short flickering. Something like, for a part of a second it's being reset, and continues to change the view after in a normal way.

So to explain better, here's algorhythm:

1. keypress "S" or "Shift+S";

2. view changes to what it should be \0,1 sec\;

3. view flickers\resetting itself on chosen position \0,1 sec\;

4. view switches what it should be switched to (e.g. from cockpit to outside view).

Comparing to normal switching:

1. keypress "S" or "Shift+S";

2. view switches what it should be switched to (e.g. from cockpit to outside view).

Forgot to say: It does not happen using default aircraft.

Tried it with PMDG 737 NGX.

Using EZDOK, it's more evident because of smooth switching.

I'll show you a video:

Thank you in advance. Does someone have any idea what it comes from?