My own experience of "not syncing" with 1.3.0 is the same as yours.
I deleted everything and started with v1.1.0.
It started syncing straight away.
When it's done, I'll update to v1.3.0.
Update.
I deleted all the SIA-UI directories and the stuff in \AppData\Roaming\Sia-UI\sia
then downloaded version 1.1.0 of the Sia-UI.
It started synchronizing almost straight away.
Once done, I'll upgrade version 1.3.0 all being well.
@trpimi The official explorer may not be reading completely accurate at this time. Wait some more hours if you still don't get your coins report to nano pool.
Json files corrupting in the roaming directory - search for in in the forum - you might have luck to delete some of them - this phanomonon is one very evident source of disruption of the clients service..