hap mini cloud ddns problem

hello.
today i just purchased for a first time a mikrotik hap mini to setup for cloud access for dvr but… some weird problems appeared never seen before on other mikrotiks.

  1. when router is with default configuration, internet from ether1 cloud dns points to public address from parent router and router has local address from parent router as normal (as a warning). ok with that.
  2. creating a pppoe interface changing firewall rules from ether1 to pppoe and masqerade to that interface also deselecting default route and peer dns from dhcp client (or disabling dhcp client to ether1) and making default route and peer dns to pppoe as done before on many mikrotiks creates a strange situation: cloud dns cannot update anymore with timeout and second try gives some weird unexistent ip address as my public adress with no access to it from remote but i have internet connectivity to local network with that address!!! (tested with ident.me). when i check public ip address from pppoe (on ip address menu) it is not the address cloud dns and ident.me resolves to (how is that possible?) neither the public ip from parent router (checked) and the most weird of all… if i revert step by step what i changed backwards to the begining (internet from ether1, deleted pppoe etc) again cloud dns keeps resolving to that unexistent ip address (it doesnt exist anywhere on any router interface. how??). tried to reboot no luck it only recovers cloud dns by resetting configuration and keep internet from ether1 connected to parent router (untouched default configuration).
    ros version 6.39.3.
    does anyone facing the same problem? maybe some bug with hap mini?