BPi-R4 Reboot fails

Hello,

I have a weird bug since yesterday.
I disassembled my Router's custom enclosure to add a second WIFI-card (now running 2*AW7915-NP1).
After plugging in the 20V PD-cable again, the router came back online just fine. Temperature is ok (figures after a coule of hours using it:), both cards are cooled passively.

root@Router_UG:~# sensors
mt7915_phy1-pci-10100
Adapter: PCI adapter
temp1:        +47.0°C  (high = +120.0°C, crit = +110.0°C)

sfp2-isa-0000
Adapter: ISA adapter
VCC:           3.33 V  (crit min =  +2.90 V, min =  +3.00 V)
                       (max =  +3.60 V, crit max =  +3.70 V)
temperature:  +44.8°C  (low  =  -8.0°C, high = +73.0°C)
                       (crit low = -13.0°C, crit = +78.0°C)
TX_power:    532.00 uW (max = 794.00 uW, min = 316.00 uW)
                       (lcrit = 251.00 uW, crit = 1000.00 uW)
RX_power:    579.00 uW (max = 794.00 uW, min =  16.00 uW)
                       (lcrit =  10.00 uW, crit = 1000.00 uW)
bias:          6.00 mA (crit min =  +0.00 A, min =  +0.01 A)
                       (max =  +0.01 A, crit max =  +0.01 A)

cpu_thermal-virtual-0
Adapter: Virtual device
temp1:        +42.7°C

mt7915_phy0-pci-0100
Adapter: PCI adapter
temp1:        +45.0°C  (high = +120.0°C, crit = +110.0°C)

So installation obviously went fine.
My problem is the router does not like sending a reboot/restart via cli or luci. When doing so, the boot-process hangs (only the red led is up). In this situation the only workaround is to withdraw the USB-C-cable, wait some seconds and then plug it in again.
This worked well in the past (could be the case this bug was introduced in 24.10.1, but I don't think so).

Any idea, what I am doing wrong and this issue may arise from?

Best,
ssdnvv