After upgrading from version 4.0.2 to version 4.0.3 kleopatra no more shows my openpgp smart card of my yubikey 5. Only PIV-tool is visible but I do not use it. After downgrade to version 4.0.2 the openpgp smart card PIV is usable and visible again.
I tested this on 3 different PCs with windows 10 and Microsoft updates included. It was allways the same.