F70 stalls randomly under way

[SeaFearer89]

Just after abit of advice on a F70 that has started to stall randomly while travelling. No cough or splutter just a dead in the water stall. Cranks straight back up and can go another 2mins or 1 hr or even the rest of the day with no issue. Seems to be getting worse each trip out. To me it doesn’t feel like a fuel issue more like a electrical issue. Any help would be great.
Thanks

[TONYG279]

Change sparkplugs and see if it fixes the issue

[99yam40]

check all battery connections, sounds like the ECU or main relay maybe losing power

[SeaFearer89]

Getting a full service and will check all battery connections and throttle control connections. Will post results