Hi there.
After update SXT LTE to current 6.40.1 graphical representation of the signal level (Quick Set menu) began to show incredible values:

But in terminal everything is quite well:
[admin@SXT LTE] > interface lte info lte1 once
status: online
revision: chip:2.0 fw:0.1.2.4
current-operator: 250,11 (ECI 64310277/ eNBI 251212)
current-cellid: 5
imei: XXXXXXXXXXXXX
imsi: XXXXXXXXXXXXX
uicc: XXXXXXXXXXXXX
earfcn: 2825 (band 7, bandwidth 15Mhz, DL freq 2627.5Mhz)
rssi: -57dBm
rsrp: -87dBm
rsrq: -11dB
sinr: 1dB
It’s a bug?