WebInterface freezes when fetching log data without filter

I have an issue with the WISE-4050 (Wifi) which freezes when I fetch the log via REST. Now the device holds 150.000 records and when I fetch it via the WebInterface or via REST I get a timeout exception. After the exception it is impossible to access the webinterface again. To what I see the device is still running and is collecting data from the inputs.

When I use a filter to get e.g. only the least 1000 records - there is no issue. 
Also another WISE-4050 (LAN) does not have this issue...but maybe the LAN version is different to WLAN version.

Thanks for helping out
NPH