A new mandatory release is now available.
This release focusses on removing the timestamp field from individual transactions in an effort to make transactions more compatible with upstream style transactions, meaning it will become easier to develop third-party software related to pandacoin in the future.

The full rollout is scheduled to happen on Mon 1 Aug 12:00:00 UTC 2022 so please make sure you have your node(s) upgraded by then.

The new release can be downloaded from the release page https://gitlab.com/pandacoin/pandacoin/-/releases/v4.11.7pnd or from our regular homepage https://pandacoin.tech/wallet.

Staking is working fine IMO,  90days is the maximum coin age, so gaining more age not staking will not help.  That said our network difficulty is high so staking is taking longer than it was, however the longer it takes the more reward you will get.

If you are having issues or concerns, I would be happy to look further into this with you. The Pandacoin development team offers support through email,  send an email with as much detail as you can to support@pandacoin.tech  per https://wiki.pandacoin.tech/support/support

Are you updated to the latest version ?

Issues can be posted and responded to on the Pandacoin gitlab  https://gitlab.com/pandacoin/pandacoin/-/issues

>can someone explain the formula or logic how the transaction for POS is selected?
99% 90 days mint probability means you are required to run your wallet 90 days at a time (read: 2160 hours) to get a probability of 99% (read: very likely).
This doesn't mean you cannot mint anywhere in-between 1 second and 90 days of runtime. It's just more likely to happen towards the 90 day marker.

"263 days age" doesn't factor into the above outside of accumulating transaction weight up to the 90 day mark.

>Why the highest probability no longer has priority over lower probability.
The selection process is not stack based. It's based on probability.
If you were to flip a coin, where each side has a probability (read: chance) of 50%, would you end up being surprised about getting head over tails on any given flip?

By that logic we should be seeing a lot of small time transactions, near 100 coins or lower, minting blocks left and right. That is not the case. 

Are you, per chance, keeping your larger transactions in a secondary wallet?

That's certainly not how it works. You can use http://peercoin.github.io/peercoin-POSCalculator/ for example to calculate percentages properly.

The entire network is trying to do the exact same thing you are doing at the moment: generate blocks to get the block reward. 
Read: You're competing against a volume of ~100 million coins worth of valid transactions each day. Transactions that have been actively trying to stake for months on end.  
And there's only about 150-170 blocks that can be generated on any given day.

Can you point out which exact update you are talking about? Because the PoS algo hasn't been touched in years.

To summarise:
Either combine your transactions and turn off stake splitting if you can't deal with sporadic-every-now-and-then rewards, be more patient, or get more coins to stake for you.

Thank you for that link to calculator.

the calculator shows me the same % as my wallet.

isn't the 2.5% APY stackable? so does it matter how often you mint? I see in the explorer that some really big sums got a 2.5% reward and before that something like 1%. That is already around 3.5%. The sum of time is 1 year and 2 months, so why 3.5% and not the calculated 2.7%?
https://chainz.cryptoid.info/pnd/address.dws?PUhqmidaYT8R7JHSwnbrPAcYf9KSrxgW6h.htm

so back to my problem. I found where it is. I found some very strange things while researching and comparing with the wallet and block explorer.

Problems I have seen:

a. the wallet shows and tries to stake transactions that do not exist in the blockchain explorer
b. the wallet shows and tries to stake transactions that do not exist in build wallet coin control window
c. my wallet address balances are lower compared to what the block explorer shows
 
1. how I can repairs these issues?
2. is there also a command for *.conf file, which make turn off stake splitting? if not can be added in short time or next update?
3. is it possible to add command into wallet, in debug windows like "setstakesplitthreshold" "getstakesplitthreshold" and "setstakecombinethreshold" "getstakecombinethreshold" and "getstakingstatus", in short time or next update?
4. is there a way how I can combine transaction back to bigger amout without sending them?
5. how is now set that setstakesplitthreshold and setstakecombinethreshold by default?

I wonder if my wallet has control of the entire balance now since I mentioned all those issues.

EDIT:

just finished -reindex command at start. That fixed problem a. and b. All that big value transaction with high probability and others are gone now.
remaining problem c. is still here. But I just forgot that immature ballance is not seen in coin control windows until it is mature, right? (which value is probably that what I see is missing) If so, all is resolved.

My wallet stopped minting completely 17 days ago. I have the latest wallet, unlocked for minting, I tried deleting the entire blockchain directory and syncing from scratch. I also try the -reindex command, all without success.
Does anyone know how to get it working again?

the problem is not the difficulty or the balance, i think there is some bug in the wallet. when i tried to use the old backup then it worked. However, I still see a mess in the minting screen, I have a lot of non-existent transactions there. Maybe the problem is that I'm still using the original wallet.

this meant the wallet.dat file.

I use the latest windows version 4.11.9