Radius auth and hashed password

I have Enterprise subscription and want to setup Radius Auth. But, pritunl sends to Radius server a hashed password (it looks like a md5 hash, but i’m not sure). And this hash every time different (may be uses a ‘salt’ hashing with password). And, of course, auth is faulty.
How to tell pritunl send a clear text pass or disable randomly hashing (in this case I’ll try to enter passwords hashes to Radius auth config).

The source code for the Radius authentication is available at pritunl/sso/radius.py