I’ve had issues with a FW13 AMD and (the same?) Kensington TB4 dock. I’ve found a (fairly brittle but functional) workaround, see here upthread. Even with a pair of Apple TB4 cables involved it still breaks, so cable dependent which smells strongly of race condition to my software-biased nose.
Tracked upstream as AMDGPU driver issue here.
The kworker issue mentioned on the first link may be specific to FW13, either way workaround was found here although several of us myself included are still awaiting the root cause fix for that.