The Big Pink Crosshair

Hello!
I'm a speedrunner, and for a laugh the other day I decided to try using KBM instead of a controller in my speedgame, which is the same one I use reshade on. I noticed this ( clips.twitch.tv/SmokyChillyOryxPeanutButterJellyTime ) was happening. A large pink crosshair would appear everytime I clicked the left mouse button, which is what I had assigned sprint to.
Considering this doesn't happen without reshade, that's where I'm pointing my finger, but apologises if this is wrong.

If this is indeed reshade causing this, I'd like to know how to prevent it from happening, as I wouldn't know where to begin outlining the rules for this, as it could be classed as cheating, despite it not being an advantage.
Many thanks.

That looks like the focus helper overlay of the CinematicDOF shader, so you may want to disable that: The variable is called "Show out-of-focus plane overlay on mouse down". It's on by default apparently.

Thanks Dude! I'll do that now, and let you know in an edit if it worked or not!
EDIT: Yep, that was it! Thank you, kindly mate!