Been banned for half a month due to ambiguous lfg

Making any kind of glitching remark on a public game can subsequently get you banned at the game developers discretion. I advise you to go to xbox.com/enforcement or to email the game company directly to absolve the issue

Exploiting glitches in games is against the ToU/CoC so i would say your suspension is justified.

The enforcement team wont accept screenshots as they can be easily tampered with.

If your case review was upheld then that's it,you will just have to wait out the suspension.

I would remove all mention of mods/modded as that has been known to get people banned after posting about modded games in LFG as there is no differentiation between developer endorsed modding and mods used to cheat.

as to your original question, it could be that the LFG post is too long

nope, the AI is just banning anything at the moment, thousands of others are getting bans for legit lfg posts that followed the rules from months ago, Microsoft needs to pull their finger out and sort it. It's all over the net not just here as these forums are just a waste of time these days.

You'll need to appeal the ban thru Xbox Enforcement, but I've never heard of anyone being banned for making a LFG. If the reasoning behind you being banned is because you've already been reported for Communications, then I'm thinking you've probably been
Comm Banned the first time and now they've simply decided to ban your account this time. Sorry.