I had a game with one of those referees when I was a level 4. A local step 3 ground had the away bench at half way and the home one next to the corner flag at left back, which was OK as most referees run with the Assistant on that end. However, this referee always ran the opposite diagonal so I was at the far end of the pitch as senior. His instructions were "you manage the away bench. Leave the home bench to me because that's my end. I'll call you down if I need you to witness something but otherwise don't get involved"Depends entirely on who is running the hearing and how sensible they are. I was involved in a charge where I gave advice to the referee which he acted on, that was later deemed to be incorrect in law (it wasn't, but hey ho). The referee told the FA that I had told him what happened and he had chosen the sanction based on that advice, therefore the fault lied with him. He was suspended for 3 weeks, I was sent what amounted to a written warning, and the other AR faced no action.
Of course if the referee denies he told AR2 not to write down cautions AR2 has the option of taking it on the chin or appealing it, hoping AR1 backs him up. Thankfully such referees are few and far between, but sadly they do exist.
In the game he had a few issues with the home team and their bench kicked off. He totally ignored them. I tried to calm them down by shouting when he wasn't nearby but most of the time he was standing near them so I left it to him.
After the game the assessor came in and gave the referee praise for his handling of the game, before turning to me and asking why I hadn't dealt with the home bench. I expected the referee to say that he'd told me not to get involved, but he basically threw me under the bus. He didn't say anything at first, and eventually said that "well, I suppose I did say it would be hard to deal with them from so far away so I'd handle them if I could!" which made him look better and made me look weak, even though there was obviously nothing I could have realistically done to handle a bench about 50 yards away from me when I was on half way. I took it on the chin because I wasn't sure I'd gain anything by making a fuss, and I wasn't sure that the other AR would back me. If he didn't then I'd drop myself in it and at the time I had been looking good for promotion so didn't want to cause trouble by making myself look difficult. As it was my mark really suffered because the assessor said I hadn't done my job and I didn't get it that year anyway, while the referee did get promoted.