Hej Elsdeniep
If your Shellies go offline after setting a fixed IP, the router maybe set up in a way it doesn't accept fixed IPs. So possibly you don't need a new router but should check the router - setup.
And to your question: possibly you don't see the problems Alibaba - users have, because there's no forum. After many years of Alibaba and now about 450 Shellies in the last 1,5 years my choice is absolutely Shelly.
However, each time we try to set a fixed IP-address, the Shelly goes offline forever
Sorry, you do something wrong. My >120 shelly all work with static IP!
Is there a list of modem/routers that are recommended by Shelly?
Yes in our lexicon or link in the "tipsfor beginners".
Hej Elsdeniep
If your Shellies go offline after setting a fixed IP, the router maybe set up in a way it doesn't accept fixed IPs. So possibly you don't need a new router but should check the router - setup.
And to your question: possibly you don't see the problems Alibaba - users have, because there's no forum. After many years of Alibaba and now about 450 Shellies in the last 1,5 years my choice is absolutely Shelly.
MarkusSorger thank you for your opinion.
In Holland, I have a Ziggo modem.router with Puma7 chipset 
.
The setup can hardly be changed (DHCP settings, etc.)
I want to bridge the Ziggo modem and create a VLAN in a better manageable router.
Do you think that is a good idea?
I really like the Shelly concept, but in my experience we do not come across installation and connectivity problems with other devices. Our Shelly's demand more problem solving.
For that reason I am looking to create a better setup.
