im able to do a passtrough via the webfig but i lost all possibility to manage the wap lte so everytime i want to configure something i need to reset it to be able to access it and everytime i need to reconfigure the device.
So first of all i remove ether1 from the default bridge and after i go to LTE settings and put ether1 as the passtrough interface.
On some the devices i get the public ip but on other no. On my computer its always working. When the passtrough is working i cant manage via ethernet or wifi to go to 192.168.88.1.
What you are experiencing is the consequence of pass-through working: lte modem will pick up packets off eth1 for specific mac address. It has been documented by Mikrotik on wiki.
Solution: create a vlan interface on ether1 and set pass-through to that interface. Ether1 will then become management interface.