Battery was 98% yesterday now it's 100% on 18.23 rise instead of dropping

So on Monday night I did charge the watch to 100% ( this was the first full charge on 18.23)  yesterday did some rowing activity on Rowerg (16km = 1 hour and 8 minutes) and battery dropped to 99% and did some walking 16,897 steps dropped to 98%, before I went sleeping still 98% ( I don't wear the watch in sleep) so this morning I as looking at the watch and could not believe my eyes 100% battery strange

Right now I did a hard reset press power button 30 sec and the power back on. for the moment still 100%....

Today I will go for a run 21km and see how it is....

Software 18.23 sure it's buggy

similar to me I think :

forums.garmin.com/.../18-22---battery-stuck-at-100