Vugen 11.52 issue with transaction names including underscore _

Hi All, 

we found following issue and maybe some of you could help.

We upgraded our Vugen to (11.52) and the BPMs (from 9.02 to 9.22). 

- Old Scripts (Vugen 11) that includes an _ in the transaction name work fine with BPM 9.22 (see screenshot_1 transaction PCM);

- New Scripts (Vugen 11.52) that includes an _ in the transaction name do not work with BPM 9.22, if I change the transaction name for example from BIF_2 to BIF2 the same script works fine (see screenshot_2).

Is this a bug? Any suggestion?

Thanks and kind regards!