Rewards duplication

Hi,
 
With the latest version 3.1.10 and Paper 1.21.3 as well as LeafMC 1.21.4 (Paper fork), it's possible to spam the rewards menu to get more than you can collect.

I don't know if it's related, but when some players disconnect, they continue to receive rewards for game time even though they're no longer connected to the server, so they're receiving rewards without being detected..