Maybe bugs in statistics counter

Hi everybody.
I have a simple scenario. I 'm using pppoe for internet connection and nat ing it for my internal clients.
Fasttrack and fastpath are also disabled. I have just a simple rule masquerding range 192.168.88.0/24 to pppoe-out interface.
I have noticed that statistics of my nat rule are so weired low, for example 10k packets and about 1MB’s but my clients are downloading more more than this , perhaps megabytes of data per seconds from internet.
I have just a simple nat rule in ip firewall section :

add action=masquerade chain=srcnat out-interface=pppoe-out1

What’s wrong? Why counters are so low and inacurate?

It is normal. Only the first packet of a session is counted by the NAT rule, further packets are processed by the
temporary translation rule for that session.

Thanks for answer. But what if I want to gather the statistics or disabling this behavior? No solution?

You can use it to count the number of sessions.
When you want to see the number of bytes, you need to look in the Filter section of the firewall
or in the number of bytes shown for an interface.