Hi there,
glad to hear that I'm not alone. I'm also using a TL-WR1043ND (with custom firmware - DD-WRT v24-sp2)

I tested all possible WiFi security settings, but I only got a stable connection to Jolla when I set Wireless Security setting to "disabled".
Another strange thing is, since my router is normally set to "WPA2 Personal" with AES. If I enable Virtual WiFi Hotspot on my notebook Jolla won't even connect even though the created hotspot is WPA2 Personal, too.

But back to the main problem and the connection dropouts. Could these be related to some sort of battery saving stuff, something like turn off WiFi when in standby etc...

Btw. My IroN900 connected fine to this setup since day one!

Regards,

J4ZZ