“significant time advantage”
Time Clock cheating


Sounds like a connectivity issue. See https://support.chess.com/customer/en/portal/articles/1444849-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken-?b_id=12321.
It's not necessarily connectivity problems on your end. Just somewhere between you and the server.
There is no way to hack the clocks. Anyone who had that kind of control over the server would be looking for financial information, trade secrets, personal information, something they could sell on the dark web, etc. Cheating in a few games would be very low on the priority list. See this thread in the Cheating Forum for more information: https://www.chess.com/clubs/forum/view/on-hacking-the-interface-clocks-etc-possibilities-and-practicalities

I was playing bullet 1 min then it glitched and I lost connection. The clocks where flashing then it reconnected and I lost rating points.

the clock on cc is one of the reason cc is the baddest chess site on the world,cc won't care anyway so this forum is useless

there is a clock cheat scum use it
No, there isn't. The live server keeps the official clocks and the clients today after each move is received.
https://support.chess.com/article/423-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken

burry your head in the sand there is a time cheat going on by some players
If there's a time cheat, why are there no videos online of people bragging about how they're doing it? Why are there no downloadable scripts to do it?
There is no time cheat. What you're seeing is the effect of internet lag (not necessarily with your connection).
There are three clocks: your computer, the server, and your opponent's computer. The server keeps all of these in sync, but due to the effects of internet lag, this occasionally results in odd jumps, especially but not exclusively if you are playing on a flaky connection.

If there's a time cheat, why are there no videos online of people bragging about how they're doing it? Why are there no downloadable scripts to do it?
There is no time cheat. What you're seeing is the effect of internet lag (not necessarily with your connection).
There are three clocks: your computer, the server, and your opponent's computer. The server keeps all of these in sync, but due to the effects of internet lag, this occasionally results in odd jumps, especially but not exclusively if you are playing on a flaky connection.
The answer is obvious. Time cheating has been around for many many years, the reason why you can't find videos on it is because it's so powerful, so remarkable, so beautiful, that any time cheating videos are immediately taken down.
How else do you think I can play in GM tournaments? I just time cheat and undo my moves, and once I have seen what his response will be if I had played that, it allows me to see the board more clearly.
I know right
Near the end of the game, I have a signed time advantage (say 1:25 vs. 0:08 remaining clock).
Then, my opponent’s time starts increasing or resetting to about the same time (0:08) for well over a minute of playing (20 - 30 moves) and my time expires while my opponent wins with his 0:08 seconds still remaining.
Is this a known “cheat” on chess.com?
Has happened to me many times!
Any solution to prevent?