Try restarting your router, try to sync your node in another network.
I saw many shit happening with Tor in many locations.
You could activate to a hybrid mode your node if you cannot fix this Tor issue. Here is a guide. That will make your node to communicate and sync on both Tor and clearnet. Is NOT accessible on clearnet, it only sync.
Also I am strongly recommending to use a static IP for your node. Here is a guide.