I've found my problem when creating the LTE APN I need to specify to use IPv4 in my case. It goes to auto after the router OS update hence my issue...

Hello guys, I have a problem with firmware upgrade of R11e-LTE module : with recent version of routerOS it's not possible to launch the update. I use a new RBM33G on default configuration and new LTE modules for my test, the APN profile is configured and LTE module is in running state (IP address an...