Batterie issue

Hey happy trident 800 owners,

after 2000 km enjoying mine in few months, got a first issue, and would like to know if few people got it too.

After few days of not using the bike, it get trouble to start and even the screen turn off (resetting all settings ...). I tested the batterie voltage and it is correct 12.6v.

When I put the batterie to charge, it's almost full already.

My triumph delear, told me it got the case just before, from an another model (speed twin 26 but not sure).

With the warranty, they will change the batterie, but the dealer doesn't think it's the root cause, but doesn't have enough customer cases yet.

Any feedback on your side ?