does not balance upload traffic - trunk interface

Hi

I have a CMTS casa systems where I configure a trunk interface

interface trunk 1
xgige 6/1 mode active
xgige 6/2 mode active
xgige 7/1 mode active
ip address x.x.x.x x.x.x.x
ipv6 dad enable
no shutdown

When I check the traffic, I see that the used downstream bandwidth is similar in the 3 interfaces, but the upstream bandwidth is higher in only one of the interfaces, in the upstream it is not balancing the traffic

I attach an image where you can see the difference in the mikrotik equipment graph where I connect the CMTS interfaces

sfp 3/3
Inbound: Current: 415,18 Mb (the upload traffic in this interface is much higher)
Outbound: Current: 3.18 Gb

sft 4/4
Inbound: Current: 156,28 K ( the expected value is 138 Mb more or less )
Outbound: Current: 3.26 Gb

sft 5/5
Inbound: Current: 128,32 K ( the expected value is 138 Mb more or less )
Outbound: Current: 3.18 Gb

What could be causing this ?

CASA-C100G#show version
Running Image: SMM_8x10G Rel 8.6.1, Ver 1,build8181, Thu Jan 16 22:42:44 EST 2020,(relmgr)
Image booted from: nvram, File name: ccsi.gz.rel8.6.1.1_build8181
Casa RMI_BootLdr: Major 12, Minor 4 Build 11

PEER SMM VERSION:
Running Image: SMM_8x10G Rel 8.6.1, Ver 1,build8181, Thu Jan 16 22:42:44 EST 2020,(relmgr)
Image booted from: nvram, File name: ccsi.gz.rel8.6.1.1_build8181
Casa RMI_BootLdr: Major 12, Minor 4 Build 11

CASA-C100G#show system
Product: C100G, System Uptime:9 d, 0 h, 43 m, 39 s
Chassis Serial_No: C100GDPAF5537
System Time: Mon Jan 23 20:32:38 UTC 2023
128MHz, 3 PPM Crystal Clock

Module 6, Master SMM_8x10G, Status ACTIVE
Major rev 1, Minor rev 4
Serial_No: SB11CE6S0086
CFE version 12.4.11
Uptime: 9 d, 0 h, 42 m, 38 s

Module 7, Slave SMM_8x10G, Status STANDBY
Major rev 1, Minor rev 4
Serial_No: SB11CG7S0237
CFE version 12.4.11
Uptime: 9 d, 0 h, 43 m, 40 s