Why is downlink rate limiting not working but uplink is?

Question

Mikrotik

Good afternoon! Dear experts, please tell me, I'm trying to limit the speed for a subnet, but the restrictions only work on upload. The download speed is not limited. But why?
I have two rules that label packets. Statistically, they work.
And there are two rules in the Queue tree, with rate limiting differing only in packet marker and names.
(Queue type : default-small,Parent global)
Outgoing shaper - works. Incoming no :(
Any idea would be welcome. Kick in the right direction.
Thank you!
Here are the rules:
Mangle

11    chain=prerouting action=mark-packet new-packet-mark=83_U_mark passthrough=yes src-address=192.168.83.0/24 log=no log-prefix="" 

12    chain=prerouting action=mark-packet new-packet-mark=83_D_mark passthrough=yes dst-address=192.168.83.0/24 log=no log-prefix=""

Queue tree

5   name="queue2" parent=global packet-mark=83_D_mark limit-at=0 queue=default-small priority=8 max-limit=5100k burst-limit=0 burst-threshold=0 burst-time=0s 
     bucket-size=0.1 

 6   name="queue3" parent=global packet-mark=83_U_mark limit-at=0 queue=default-small priority=8 max-limit=5100k burst-limit=0 burst-threshold=0 burst-time=0s 
     bucket-size=0.1

Answer 1

Do you have a network 192.168.83.0/24 behind nat?
If yes, then mangle prerouting is triggered even before dst-nat.
Try to mark in mangle forward.