There are still eleven nodes running XT 13.1.0 and three nodes running XT 13.1.2 on the network.  These versions are not stable, please upgrade to XT 13.1.5 asap. A full resync is recommended:

https://github.com/RadiumCore/radiumXT/releases/tag/v13.1.5

Always keep a copy of your wallet.dat file as well as a backup.