When the player is wearing armor with enchanting, the client will franticly spam the server with armor updates on every tick. This has been verified on both MiNET and PM. Log extract below:
2017-03-15 22:00:04,925 [DedicatedThreadPool-ab7b9255-fee5-4302-8dc9-e4c568c775b0_7] DEBUG MiNET.MiNetServer - > Receive: 33 (0x21): McpeMobArmorEquipment
2017-03-15 22:00:04,977 [DedicatedThreadPool-ab7b9255-fee5-4302-8dc9-e4c568c775b0_5] DEBUG MiNET.MiNetServer - > Receive: 33 (0x21): McpeMobArmorEquipment
2017-03-15 22:00:05,028 [DedicatedThreadPool-ab7b9255-fee5-4302-8dc9-e4c568c775b0_8] DEBUG MiNET.MiNetServer - > Receive: 33 (0x21): McpeMobArmorEquipment
2017-03-15 22:00:05,079 [DedicatedThreadPool-ab7b9255-fee5-4302-8dc9-e4c568c775b0_6] DEBUG MiNET.MiNetServer - > Receive: 33 (0x21): McpeMobArmorEquipment
2017-03-15 22:00:05,130 [DedicatedThreadPool-ab7b9255-fee5-4302-8dc9-e4c568c775b0_1] DEBUG MiNET.MiNetServer - > Receive: 33 (0x21): McpeMobArmorEquipment
2017-03-15 22:00:05,182 [DedicatedThreadPool-ab7b9255-fee5-4302-8dc9-e4c568c775b0_4] DEBUG MiNET.MiNetServer - > Receive: 33 (0x21): McpeMobArmorEquipment