Web interface crash: 2 Duet Wifis

[kuhnikuehnast]

Hi there,
I observed a really strange error:
since I installed my second DuetWifi controlled printer, the web interface on both machines often crashes. e. g. during a print the timer and everything stops. I can still click on the buttons (like console etc.) and the windows open, but if I type in something, nothing happens. If I refresh the page (F5) then everything works again.
The wifi signal strength is quiet good (-43dBm in the last test) and both printers are ~1 m to the FritzBox router.
Software on both machines are 2.0(RTOS) (2018-06-05b3)

Hope you can help me out with this problem?

[dc42]

If using Chrome browser, press control-shift-J to open the debugging console. Chances are you will see a Javascript exception message when it stops responding.