@ksaefos 

Thank you for posting on the TP-Link Community.

To better assist you, please provide us with the below information:

1. Can you please describe the detailed symptom of the freezing issue? How about the LEDs status on the VR900? Are they all turning off then on automatically, how did you recover the connection?

2. How much bandwidth you got from the ISP? How many devices in the network? When some device is downloading files, will it occupy all or most of the bandwidth?

3. How about online streaming, will it affect the internet connection on the VR900 as well?

4. Does this issue occur after you update the modem firmware? Was it all find with the previous version? Please check if you can downgrade to the previous, confirm if the issue caused by the firmware upgrade.