There appears to be a serious glitch/incompatibility with the VST2 versions of over 50% of the T-TrackS 5 SUITE plugins. I have reported this issue to Bitwig and to IK support.
The work-around is simple: Just use only VST3 versions. There is even in bitwig a "prefer VST3" setting that will HIDE the VST2 versions. (Or you can just uninstall the VST2 versions if you don't need to use them in another DAW that has no VST3 support.)
The glitch is that the audio stutters horribly, and the plugins are basically unusable in VST2 format, in bitwig 4.4.8. The bug does not occur in bitwig 4.3.8 but I can't say for sure why.
WP