Ehm, there are about a 1000 sparks flying and fireworks going off simultaneously in North Korea right now... (Probably the wrong metaphore, but oh well... lost in translation..
)
First, according to their official sources they have not had one single case of Corona in country - according to the US their military was on lockdown throughout the entirety of february though.
Second, they are heavily threatening an invasion of the south at this point, which is good, because as long as they are threatening they arent invading.
Third, Kim Jong Un hasnt been seen for months, and his sister is now pushing public doctrine in the prime public position.
Fourth, another famine is rumored to be taking place (alongside a massive economic downturn), because the borders to china are now tightly controlled, as a result of the Covid-19 crisis, which means issues with black market goods getting in. Which is kind of a positive, because there is a reason for escalating the rhetoric of 'invasion of the south' and it is domestic, but probably solvable.
Fifth, the south is trying to deescalate, and the US are no where to be seen.
Sources: Pick one..
(mine was german, so I'd have to look around for several english speaking ones)
edit: Also there is a fundamental disagreement within the denuclearization talks, namely that the north demands for the US to also remove their strategic nuclear weapons from the area, which for the US is a no go, and the end of US sanctions, which for the US is a no go. So talks are stuck.