Please Fix Lowering Weapon In Combat

There needs to be a small tweak to the gameplay mechanic that lowers your weapon when you get too close to an obstacle like a wall.
On multiple occasions, I have been in a point blank firefight with an enemy player, where I opened up on the enemy player first only to have my weapon lowered because he ran into me at point blank range, then proceeds to kill me.
It is a gamebreaking, ridiculous problem that has happened to me several times in important firefights where the balance of the entire match depended on winning the fight.
Please fix the gameplay mechanic such that, weapon is not lowered by an enemy player running into you.
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