@tehn
I did a few tests now and what I experience with two Ansibles, the official 1.5 and the alternative firmware proposed by @sam is this:
The trigger outs of Levels always freeze within a few minutes with the firmware 1.5 when Ansble is externally clocked at a rational rate. CV is still responding to changes on Arc, changes are displayed correctly - just the trigger outs stick to āonā.
Every other possible combination of interfaces, modules and firmwares never lead to this (at least not within a short period). Grid is stable on both firmwares and Levels is stable on the new alternative firmware. This is consistent over both Ansible modules. They are connected to tt over the powered i2c bus but teletype is currently empty and nothing is plugged in.
EDIT: Clocking from 4ms DLD