CPU raises 100 % with static routing and lot of ip addresses

Hello!

Currently i´m running a Mikrotik CCR1036 8G 2S+ v6.19 / firmware 3.18 with a default gateway static routing to my provider and with more or less 19.000 ip addresses in a bridge with two interfaces.

After migrate my infraestructure to CCR, it begins to lost packets, reboot itself (it was a problem with watchdog timer check, i had to disable it for avoid reboots) and cpu raises 100 % in the 36 cores (with high packet loss and lost of connectivy. I do not use vlan, link aggregation or other features for avoid overhead). I checked with profiler and it says that my percentage of use is wasting time of cpu in a 70-80 % in networking.

I´m doing something wrongly?

Thank you!

Best regards