This isn't a bug, but a limitation The max meso you can hold is about 2.147b You may purchase B coins from the NPC in FM if wanna hold more than 2b at once Note: please also refrain from trying to hold more than max meso as it may cause issues
Yup, cause trades can have up to 2.147b pure meso traded. Bcoins are easier to deal with, 30m tax per bcoin in the trade tho