A restart can indeed help.
In general we did a lot of stress tests with the bridge lately and will push some updates which are supposed to stabilize a lot of this issues.
Please keep an eye on our Beta section here where I will update you when the new Beta firmware is available (the Bridge automatically updates 1 hour after reboot and then all subsequent 24 hours, so to update it is best left running for some time). If your bridge is not part of the Beta programm you can do this by following this steps:
If this version is stable for the beta users it will be provided as a public update as soon as possible.