DRTIO link issue after gateware update

We have a system where a kasli SoC v1.1 (master) connects directly to 3 kasli v2.0.2 (satellites). After updating the gateware to the latest release-8 branch (on all kaslis) we have problems with the startup kernel below:

from artiq.experiment import *


class StartupKernel(EnvExperiment):

    def build(self):

        print("Generating startup kernel...")
        self.core = self.get_device("core")

    @kernel
    def run(self):

        self.core.reset()
        print("Starting startup-kernel...")
        self._wait_for_drtio_destinations()
        print("Startup-kernel finished.")
        self.core.wait_until_mu(now_mu())

    @kernel
    def _wait_for_drtio_destinations(self):
        for d in range(4):
            while not self.core.get_rtio_destination_status(d):
                delay(100 * ms)
                self.core.wait_until_mu(now_mu())

The master cannot establish the link to the satellites and it prints on the UART:

[     2.853581s]  INFO(runtime::comms): Loading startup kernel...
[     2.859356s]  INFO(runtime::rtio_mgt::drtio): [DEST#0] destination is up
[     2.866080s]  INFO(runtime::comms): Starting startup kernel...
[     2.871910s]  INFO(ksupport::kernel::core1): kernel starting
[     2.877566s]  INFO(ksupport::kernel::api): kernel: Starting startup-kernel...
[     5.091775s]  INFO(runtime::rtio_mgt::drtio): [LINK#1] link RX became up, pinging
[    25.098963s] ERROR(runtime::rtio_mgt::drtio): [LINK#1] ping failed
[    25.105131s]  INFO(runtime::rtio_mgt::drtio): [LINK#2] link RX became up, pinging
[    45.111915s] ERROR(runtime::rtio_mgt::drtio): [LINK#2] ping failed
[    45.318912s]  INFO(runtime::rtio_mgt::drtio): [LINK#0] link RX became up, pinging
[    65.325877s] ERROR(runtime::rtio_mgt::drtio): [LINK#0] ping failed
[    65.332044s]  INFO(runtime::rtio_mgt::drtio): [LINK#1] link RX became up, pinging
[    85.338840s] ERROR(runtime::rtio_mgt::drtio): [LINK#1] ping failed
[    85.345000s]  INFO(runtime::rtio_mgt::drtio): [LINK#2] link RX became up, pinging
[   105.351800s] ERROR(runtime::rtio_mgt::drtio): [LINK#2] ping failed
[   105.558792s]  INFO(runtime::rtio_mgt::drtio): [LINK#0] link RX became up, pinging
[   125.565761s] ERROR(runtime::rtio_mgt::drtio): [LINK#0] ping failed
[   125.571922s]  INFO(runtime::rtio_mgt::drtio): [LINK#1] link RX became up, pinging
[   145.578716s] ERROR(runtime::rtio_mgt::drtio): [LINK#1] ping failed
[   145.584877s]  INFO(runtime::rtio_mgt::drtio): [LINK#2] link RX became up, pinging
[   165.591676s] ERROR(runtime::rtio_mgt::drtio): [LINK#2] ping failed
[   165.798672s]  INFO(runtime::rtio_mgt::drtio): [LINK#0] link RX became up, pinging
[   185.805640s] ERROR(runtime::rtio_mgt::drtio): [LINK#0] ping failed
[   185.811800s]  INFO(runtime::rtio_mgt::drtio): [LINK#1] link RX became up, pinging
[   205.818598s] ERROR(runtime::rtio_mgt::drtio): [LINK#1] ping failed
[   205.824764s]  INFO(runtime::rtio_mgt::drtio): [LINK#2] link RX became up, pinging
[   225.831560s] ERROR(runtime::rtio_mgt::drtio): [LINK#2] ping failed
[   226.038552s]  INFO(runtime::rtio_mgt::drtio): [LINK#0] link RX became up, pinging
[   246.045516s] ERROR(runtime::rtio_mgt::drtio): [LINK#0] ping failed
[   246.051677s]  INFO(runtime::rtio_mgt::drtio): [LINK#1] link RX became up, pinging
[   246.259513s]  INFO(runtime::rtio_mgt::drtio): [LINK#1] remote replied after 1 packets
[   246.470514s] ERROR(runtime::rtio_mgt::drtio): [LINK#1] failed to load routing table (timed out)
[   246.678521s] ERROR(runtime::rtio_mgt::drtio): [LINK#1] failed to set rank (timed out)
[   246.686333s]  INFO(runtime::rtio_mgt::drtio): [LINK#1] link initialization completed
[   246.694058s]  INFO(runtime::rtio_mgt::drtio): [LINK#2] link RX became up, pinging
[   266.700477s] ERROR(runtime::rtio_mgt::drtio): [LINK#2] ping failed
[   266.906480s] ERROR(runtime::rtio_mgt::drtio): [DEST#2] communication failed (timed out)

While on the satellites the UART prints [ 4.589290s] WARN(satman): received unexpected aux packet multiple times.
On the other hand, if I rewrite the startup kernel such that it does not wait for self.core.get_rtio_destination_status(d) and does nothing the link can be established without a problem.
I think what is happening is that self.core.get_rtio_destination_status(d) always returns False. And somehow, while the startup kernel is running, communication to the satellites fails.
How can we fix this?