The NJ rep and her Chief of Staff reported their concerns to the House Sergeant-at-Arms on Jan. 5 per interviews given by Rep. Sherrill.
She reported that the House Sergeant-at-Arms concurred on in the conversations when this was reported, both her own and that of her Chief of Staff, All parties agreed that this was unusual and could only be done under current visitor prohibitions since March 2020 if visitors were accompanied by a Congressional member or their staff. But still the size of the groups was also concerning. The lack of COVID protocol adherence a further concern. I heard it described that masks were mostly pulled down beneath chins if worn at all.
This Rep and their Chief of Staff were apparently not the only ones to notice this (also PA Rep. Scanlon I recall by name), and some who noticed also reported I think per Sherrill's interviews.
Since she spent nearly 10 years in the USN, she prefaced this unease and reporting as a natural byproduct of her training. She explained that with each new assignment, ship, base, whatever, there would always be a basic security briefing as part of the new duty assignment. The emphasis was always on an awareness of your surroundings, if something seems unusual, observe, report, assume it is until you know it isn't. This encompassed her aircraft and extended to her surroundings on base and off.
This was her military training vigilance.