Vodafone Router issues

Hi, I did try to rekindle and old thread but had no traction so please forgive the repeat question.

I have recently been having regular internet dropouts on my Vodafone FTTC (100mb) service, using their Vodafone Gigabox router. I have been with them for 4 years or so with the occasional issue, but it’s been very stable.

Their ‘advisors’ are now telling me that’s it because I have more than 32 devices and it’s not my line. However, I can find only scant details on this 32-device limit, so I am just wondering … Is this an actual thing? Is it for Wi-Fi only connections or does it include hard wired and wireless devices in combination?

Being aware that I have a lot of devices (all the usual laptops, tablets, IOT bulb etc). I purchased a wireless mesh system (Deco X50) but I only configured the mesh system to broadcast the Wi-Fi and switched the Wi-Fi off on the router. The Vodafone router is handling the DCHP. This has been working for at least a year.

After the most recent spell of dropouts, I reset the router, disconnected everything and have slowly been adding devices back on to the system but I am still well below the 32-device limit. It’s held very steady for a few days (but it has held up for more than this before, so still testing).

My final question is would any other provider modems be better (e.g. Eir) in terms of handling devices as my contract is up at the end of the month so could change.

Any advice/information welcome.