Play after win skips initial stake

[elkd]

There is a very rare case in which, Eg the init stake is 0.35 and martingale is 0.14, the stake for the next play after the win jumps to 0.4 instead of 0.5.

Theoretically, this can happen when the bot fired the play button but deriv website didn't receive the event or blocked the play button but the bot didn't catch any exception, in this case, the bot will go on to calculate the next stake, likely declare loss if the last digit doesn't match and update the stake.

I still don't have an efficient solution to stop this, also it's hard to test as it happens so rarely.