All feedback across the board is showing Jmod as the mod that is causing this since the update. We removed it on our server, and have had multiple people also remove it and respond to the mods thread on Steam confirming Jmod is the issue.

Has anyone figured out which mod is causing this issue yet?

We are thinking it may be CF, because it doesn't just happen with scopes, I just noticed it makes the screen blurry when exiting the map also.

In T161011#2238817, @Geez wrote:

Hello everyone.
Can you please let us know if this does occur without mods or if is this an issue related to some kind of mod?
Regards,
Geez

If it goes away when all the mods are removed then I would have to assume it's going to be one of the mods needing an update to fix it. We will be searching our server for the mod that has the issue. I will update this thread if we find the mod, and then we will put a bug report in on that mod.