From ukdxer's post and other info on Internet, it may be that IRIB on 6210, and later the tones on 6206 to 6214 were jamming against an audio relay of Iran International TV.
Wondering where are based those SW (and even MW) relays
I guess this theory is out of the window since the jammer is back on 6210 and not followed them to 6220. I haven't been able to verify if the thing on 6210 before the jamming is the same thing I heard on 6220 this evening when the STANAG was off. By the way that STANAG is always there on 6220, I don't think its especially there to jam this station