block headers sync unreal slow (3 weeks wallet was offline, 20 min sync for only headers, and no progress indication in this time), devs please investigate problem
1) what operating system are you using?
2) in the next version of the wallet - we will change the method of hashing headers, this will give a significant increase in speed.
In the meantime, you can use the web version of the wallet or keep the wallet constantly running (thereby helping the network). In Windows, the status of the header synchronization state is visible.