I have the same screen issue. The device is unreliable. It was also seemingly bricked. The on-line reports are to keep re-flashing until it works, and that did it for me: but the screen is toast all the time.
The USB C charger only works one way round.
I am testing it for use as a solar node (RAK 4631 Solar Repeater - #73 by adingbatponder ) and seems to work for that. I am using this antenna
Taoglas FW.86.B.SMA.M e.g. from FW.86.B.SMA.M | Taoglas Antenna, ISM, 850 … 890 MHz, 240mm, 3.5 dBi, Male SMA, Screw | Distrelec International https://www.distrelec.biz/en/antenna-ism-850-890-mhz-240mm-dbi-male-sma-screw-taoglas-fw-86-sma/p/30285131 ).
This is why I am seeking an alternative. I bought an H2T from Muzi Works which used the T114 but that also only works if plugged into USB C permanently else the Bluetooth switches off every second. They are seeking a fix. I ended up making my own “carry around” based on thd RAK system which is reliable.