When setting LTE/3G option to LTE getting error "Cellular (id: 2) Unsupported value: cellular sim mobileType"

Hi,
In troubleshooting our disconnect problems with ATT on the MAX-BR1 Mini models with the LE910-NA V2 we are trying to change LTE/3G option from Auto to LTE and get the following error after clicking on “Save and Apply”. So far has been happening on HW1 version of MAX BR1 Mini and Mini Core models with firmware 8.3.0 5256.
Anybody else see this and know the cause? Thanks

Cellular (id: 2) Unsupported value: cellular sim mobileType

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