Catalogue area disappears constantly when making updates to sites

This is an odd issue and the only area I can see may there is a problem is in the Quick CSS.

When I update the page the area that contains a catalogue completely vanishes (Area in White – Menu Items). I have had to go back to an older version to restore – than that stopped working – my new fix which still does not always comply is I made copy of the page and saved it as a template. I redid the page – thinking the original page had some unwanted code. Still occurring. Also note, when I made an update to the home page – the menu disappeared yet again from the menu page.

Here is the quick css I have on the site in its entirety – is there something there that would be causing this? If not, any other explanation? If needed, would give you access to the site too! Thank you for your support as always. I have spent an enormous amount of time on this and cannot find a fix.

@media only screen and (max-width: 767px) {
.av_textblock_section .avia_textblock p * {
font-size: 12px !important
}
.responsive #scroll-top-link {
display: block!important;
}
}
.textwidget {
font-size: 12px;
}
@media only screen and (max-width: 767px) {
.av-catalogue-price {
font-size: 11px;
}
.av-catalogue-title {
font-size: 10px;
}
.av-catalogue-content {
font-size: 10px;
}