Adding new coins resets the staking to not mature

I have had the Reddcoin wallet open for staking for weeks and I was just about to receive my first stake when it reset to not mature.
The reason is probably because I decided to add some more coins to the wallet as it was a bit after this that I noticed it saying “Not staking because you don’t have mature coins”.
This doesn’t happen with other Cryptocoins I stake - when you add coins, only the new coins are not mature.
Can this be fixed otherwise I can’t add coins to the wallet?

Rdd uses a different verification mechanism than other coins. Each coin has to be 50blocks old to be considered mature by the network.