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Strange UMC behavior. Memory loss?

Hi all.

French MS85, december 2014, 140 000 km, UMC replaced circa 1 year ago under warranty.

For 3-4 months, my car has strange behaviors, one at a time or several together, following a (to me) random pattern:
1- At startup, Spotify disconnected from any account (personal or Tesla). Check data connection OK. Click [connect]. Looks up. Fails. Click -> Fail loop.
2- Web browser display frozen (often on Teslawaze). Enter any site in address bar. Entry displayed, but main browser display still frozen
3- Energy graph set to display 50 km of history. km -15ish to 0 correctly shown. km -50 to -15ish flat at 0 Wh/km.
4- During normal operation, Spotify stops playing and becomes unresponsive to any command (screen or steering wheel).
5- After reboot, multimedia history and favorites lost.
6- Leaving home, car looses home WiFi (ok). Can take up to 5 min / 5 km to connect to 3G. Before, a few seconds / meters were enough.

1 to 4 are generally repaired by a reset, but sometimes only one of them, or one is repaired but another appears.
I generally reboot until Spotify and browser are OK, and don't care about energy graph. It means often 3 or 4 reboots a day just commuting to and from work (1h each).

Anybody with a clue about how to make things work again? Or at least an explanation about what's happening?

Thanks a lot!
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