Hello, we have a minor issue with the configuration of these M70 devices.
The issue is that the language settings on the M70 handsets reverts back to the default English after they are not used for a couple of minutes.

We mostly use the "Slovak" language as we are a firm located in Slovakia. This issue did not disappear even after firmware upgrade to the newest.

We have these M70 handsets paired with a couple of M900 base stations. Could this issue be because of a setting in the M900 devices?

Thank you for your help