I saw this effect one time. The tuner tuned to a completly wrong frequency, but after a few seconds it switched back to the correct one. (Because it detected no or a wrong RDS id) It seems that it stored the wrong frequency and tried it again later. The correct behaviour would be to block that wrong frequency for a while, before trying again.
It should also delete AF frequency that are not transmitted for quite some time.

Another bug for me in 2.0 final is the erase of all the RDS information (RDS text, RDS Station ID, ...) when switching the frequency (which is quite a lot). So the title information in the RDS text data does always disapears.

I'm in Switzerland.
Actual RDS information from Switzerland can be found on http://rds.cnlab.ch/