When switching presets in FabFilter plugins (e.g. Timeless, Saturn, …) both Ableton and touchAble do hang up for a (too) long period of time. I think that they want to synchronize the available plugin parameters and maybe there are too many? Or the way FabFilter advertises them is stange?
Observated on a Macbook Pro 2018 15" & iPhone 8 Plus with the latest releases of macOS and iOS.
If my guesses are correct a quick fix (at least for my use case) would be to add an option to touchAble pro to disable synchronizing of plugin parameters.