4G Connection issues in XIAOMI REDMI 3 ido

Bug type: 4G signal issues in xiaomi Redmi 3 ido
Steps that have been taken to resolve: Restarting the device
Affected version : MK90.0-ido-200414-RELEASE
Additional notes:
The 4G connection sometimes works but most of the time it will disappear, and the connection dropped to 3G and often 2G, Please note that I live in Indonesia, does your ROM supports 4G connection in Indonesia? If not, then I kindly ask you to add the support for 4G connections in Indonesia, because your ROM is the most stable than any other ROM, except for that connection issue.