Hey @PurpleAcorns, thanks for getting through to us and welcome to forums!
As it stands, I can confirm that we have received reports from other players regarding weapons no longer being visible during cinematics, however after thorough review by our development team, it has been determined that this is actually working as intended, however I do appreciate that this particular feature is breaking the immersion for you and therefore will make sure that feedback is forwarded accordingly.
Should you have any further queries or run into any difficulties, do not hesitate and reach out at any time!