Yes, it matters because attorneys follow ethical rules set down by their state bar/commission. Although most are modeled after model ABA rules, they all have their nuances. So for example, a Texas attorney would follow the Texas Disciplinary Rules of Professional Conduct. See HERE.
Unfortunately, this is not a conflict of interest. See 1.06 through 1.09 in the link. Conflict of interest would be if the attorney represented YOU at the same time (or at some time before).
However, they did/do not. They do represent a party that is attempting to sue you, but that does not in any way "conflict" with your interests. The attorney can be related/know another party that has another adverse action against you.
There may be a conflict for the realtor. I cannot say the same for the attorney.
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