Party chat very choppy for last month

Evening all,

Myself and a few others i play xbox with are having a few difficulties with party chat lately... well probably for the last month.

Our connections are generally always stable. Not had any network issues etc.

How it started:

Me and 2 others in a party. One in particular we can barely hear, when he talks it cuts out a lot so we're only hearing half sentence. I noticed it started cutting out a bit to my other friend too but not as bad. When my friend who was having the issues left I could hear and talk to my other friend perfectly.

Next day, same issues but everyone getting it, we put it down to xbox live having issues so just give up for the evening.

Day after same again, can just about make out what we're saying to each other.

Its been like this since, there's usually 4 or 5 of us in the party. 2 of them who game in the afternoon say they have no issues at all, but when myself or another joins they can't seem to hear us and vice-versa without the choppy interference.

We've tried everything, hard reset, checking our network provider, updated controllers, resetting routers, the lot..! We are all on series X consoles.

I've had a look around on some forums to see if there has been any issues but there doesn't appear to be? So here i am seeing if whether I can get a fix, or see if others are having the same problem!

Fingers crossed! Cheers!

:)