Any changes in auth/connection scheme last month?

I use Dynalist on a wide set of computers.
Last week I note that my Windows browsers (Opera, old FF, Chrome) fail to connect Dynalist page directly but still work perfectly via VPN. MacOS Chrome works perfectly. That’s true for different city I travel and different providers, but the same for Win and Mac.
Also Android Opera, Chrome, FF fail to connect via mobile network, while application works.
ping shows no problem in network, as well as tracert

I have no idea

Now is working okay