I have removed OptiFine before and it still happened. I know it can’t be that because of it. As I said in the original post, this problem only affects my modded client and I've installed many OptiFine clients separately without any problems like this.
THIS POST IS EDITED AS MODS GET CHANGED. THE THREAD WILL NOT CLOSE UNTIL THE MOD CAUSING THE ISSUE IS IDENTIFIED.
I have a problem that I've been experiencing for a while and it is exclusive to my modded client on 1.10.2. When I'm in game, I ever so slowly look down, at a rate that is so slow that it is barely noticeable, but makes time-lapses impossible. This is similar to but not the same as the issue previously mentioned in a thread whereby the camera would keep moving slowly when the mouse was not moving, and it was suggested that OptiFine was the culprit. I know that OptiFine is not doing this because in every other scenario I play Minecraft Java Edition I have OptiFine installed and I'm capable of not looking down all the time.
The list of mods I have installed on my 1.10.2 Modded client is as follows:
Uncrafting table 1.6
ArmorPlus 184.108.40.206 (Previously 220.127.116.11) [NOT THIS ONE]
Better Sprinting 1.1.6
Crayfish's Furniture Mod 4.1.2
Chisels and Bits 12.12
Code Chicken Core 18.104.22.168
Code Chicken Lib 22.214.171.1240
Compat Layer 0.1.7
Counter Guns 1.0.1
Custom NPCs 21jul17 [NOT THIS ONE]
Extra Utilities 2 1.9.9 (Previously Alpha 1.0.1) [NOT THIS ONE]
Grapple Mod 7
Iron Chest 126.96.36.1991
Josh's Xmas Mod 1.1.1
Lootable Bodies Mod
Malisis Core 4.4 (Crashes game on bootup if OptiFine is changed, latest available version)
Malisis Doors 5.2
Minecraft Comes Alive 5.2.3
More Player Models 16jul17 [NOT THIS ONE]
Not Enough Potions 1.3
OptiFine HD U E7
The Dragon Lib 188.8.131.52 (Previously The Dragon Core 184.108.40.206) [NOT THIS ONE]
Tinkers' Construct 2.6.5
Wolf Armor 220.127.116.11
Xaeros Minimap 1.12.2
Remember, the slow looking down only affects the modded client with these mods, even if some of them get removed. This thread was previously posted on Planet Minecraft but due to "account inactivity" nobody could reply to it.