Server kicks player because of a too high number

If you give a player for example a leather_chestplate with nbt of {display:{color:HERE A HIGH NUMBER}} with a high number so the chestplate gets red, the player gets kicked from a server. This is NOT a problem in single player or lan worlds (tested). It might be a too high number for a variable... The number I tested was 233253170. This player can join the server again if his inventory gets deleted.