Sure, I was running RM500QGLABR11A02M4G and it behaved quite strangely , it did never reach above 150 mbit/s even though I was conducting controlled tests under 5G , so with other devices I was obtaining about 700mbps…
Long story short, the module end up having internal problems, RF components broken or so, at least that is the internal report that the modem gives.
One potential reason may have been the poor grounding of the unit while installed in the Odyssey, this is because the unit is larger than the standard LTE modules… so you have no direct bolt to use.
Summary: I will have to replace the unit.
Cheers,