I dont think that she did something bad and is hiding it but that she is willing and able to lie (from story perspective you should be given a choice to trust her just like Riley)), I dont particularly self insert (beyond role playing someone kind

) but even as a character in the story she went from someone as trustworthy as MC sister to as trustworthy as Riley was of update 4.....which is an issue because we all know she is going to end up being "trustworthy" due to her being an LI which just makes the whole thing feel pointless
I dont doubt some self insert coomers are angy that waifu dared to lie to them, but i think there is a perfectly valid reason to have negative views on this