The problem of superposition of acid deceleration mechanism

[flamefield]

Will acid solutions of different grades of worm add up to the deceleration of the vehicle?
I sometimes encounter situations where I am trapped by acid and unable to move, or even press forward but experience backward movement. I always thought it was due to the compatibility between the venom, burn, ice cloud, and original worm acid of various explosion insects, poison insects, and ice insect mods that I added. But today, I encountered one situation where I was driving a tank and hit the edge of the terrain. When I turned around in place, I was spit out by the original worm acid and got stuck. Under the influence of only 50% deceleration of the acid, I could not move in any direction until the acid effect disappeared. Then, I carefully recalled that every time I encountered situations where I could not move or move in the opposite direction, it seemed that I was carrying a load. Is this considered a bug as it occurs when it stops moving in various acidic liquids? Or is it a mechanism of the game?

[flamefield]

So, will the speed of the vehicle become negative?