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EasterJoy
Guest
If you’re in a diocese in which the faithful stand after the Agnus Dei, then very often nearly everyone will stand together until everyone has received. The posture taken after one receives isn’t enforced or anything, so much as a place might have an encouraged custom, I guess you’d say. Once the last person has received, then the rest take on whatever posture they choose for the sacred silence after Holy Communion–generally speaking, this is not standing, although some will invariably stand until the Blessed Sacrament is returned to the tabernacle. Again, within a parish, there will tend to be a uniformity about this, even though it isn’t strictly defined by rubrics. The purification of the vessels by one of the priests or deacons might start before the end of Holy Communion, but for obvious practical reasons it would only rarely be concluded by then. Sometimes it isn’t started until reception of communion concludes. The particulars differ from parish to parish and even from one celebrant to another within a diocese.Just to be clear about what is happening and when, when we return to our seats, the congregation mostly remains standing–just as they were when they were waiting to receive communion. Then as the priest and deacon are “cleaning up,” everyone kneels, but only until the reserved host goes into the tabernacle, then everyone stands again. The kneeling is probably 30 seconds or less. Not quite like the Good Friday prayers where you’re up/down, up/down, but still it seems to be a token kneel? Not sure.
It is in the GIRM that “Sacred silence also, as part of the celebration, is to be observed at the designated times.” The time after communion is one of those times: that is, there is to be a period after the readings (including the psalms), after the homily, after communion, and so on that is to be set aside for silent reflection. That is in the rubrics. The amount of time isn’t specified, though, only that there is to be such a time. The degree to which this mandatory time of silence is observed at all, though, let alone for how long, differs from parish to parish.
If you are feeling the period of sacred silence is too short for you, you might mention it to your pastor. Honest feedback, especially if it is given in humility, can be very useful.
as an adult and actually reading formal instructions for mass - there are guidelines that instruct you to kneel afterwards and reflect / pray about having just shared the body and blood of Christ. 