Indeed it has turned out to be an intentional habit for them now, a means to make extra money for their daily trading, and those who are not vigilant enough will fall victim to that.

I had a similar ugly incident, although I wasn't quick to notice the slash in payment from the actual amount the scammer supposed to pay me in the P2P trade and this was as a result of the urgency of the matter that I was to attend to with money at the time. All I want was just to get the money to save myself from the mess I was Una t the time.
After I was able to sort things out something prompt me to check the amount the scammer sent and compare it what i is in the exchange rate. Behold I discovered I have been dubbed. Sent a threatening message to the scammer but never replied and I even went on appealing to Bybit with screenshots of the entire case but nothing came up till date.
I urge anyone to be very careful when doing a P2P on any exchanges especially bybit no matter how distracted you may be don't get to trust anyone, verify before releasing funds. I am saying this from experience I had put of discomfort situation.