@j051y - I got a new EP06-E to test, and on windows, the whole system doesnt seem to have any issues. Drivers were from the Quectel LTE&5G Windows USB Driver (sixfab.com) product page.
Returning to my EC25G, it doesnt seem to have any issues either! Im guessing somewhere, the linux drivers arent doing so well, so i’m reinstalling the whole raspberry pi to test on both modules. Initially i thought it might be a 64bit raspbian os problem, but now im not too sure.
Edit:
One thing different this time round, im using a different set of antenna (some cheap knockoff from aliexpress). so maybe even the sticker antenna that was given in the kit, might be interfering?
Will return soon after further testing.