I think this include 8 decimals.
Correct supply looks like to be - 18921600.
Please check with your dev.
Yes you are right. The exact total supply is 18921599.68464 (~19m) and will be reached after 58 years of mining (29 halvings).
Also can you please setup a discord server?
We will try to do it this weekend.
My node node program did not shut down, nor did it crash. It automatically stopped mining 3 times yesterday, but it has been almost 12 hours now, and there is no abnormality. It may be the reason for the unstable network.
Then it must be a bug. It is on our todo list.