Greetings in Christ, CV5, and good to see some of the old names still posting here.
About these two passages, I believe you are convoluting two distinctly separate teachings from the New Testament here.
1 Peter 3:19 speaks of the harrowing of Hades, and when Jesus delivered the captives out and many of them resurrected with him and were seen in the streets of Jerusalem.
2 Peter 2:4 however addresses the angels who sinned in Genesis 6:1-4, and who were cast down into outer darkness to await their final judgment.
My problem with the notion that Jesus "proclaimed" any message to the fallen angels is partly because the specific context in which it appears in 1 Peter 3, which I can get into later. But it also kinda strikes me as a bit strange the notion that he would notify them of all people. Seems like there would be no need, sort of like if he just wanted to rub their noses in it or something (not to be facetious, Lol).
I'll wait to respond till after you are on computer, but I think you may find that once the full passage in 1 Peter 3 is treated, only the answer given in Post #8 (and I think also in Post #3) makes sense.
God bless, and good to see you again.
Vindicator