Loading more marks does not work properly

[yasuokav]

Version: 2020.3

Step to reproduce:

1. Add 31 marks
   

2. Go back to the top and refresh the page

3. Back to the bottom, the last mark disappeared
   

4. Add another mark (Total: 32)

5. The previous mark is disappeared
   

In addition, the last loaded mark cannot be edited.

Uncaught TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at unmark.show_mark_info (unmark.loggedin.js?v=2020.3:163)
    at HTMLAnchorElement.<anonymous> (unmark.loggedin.js?v=2020.3:364)
    at HTMLDocument.dispatch (jquery-2.1.0.min.js:3)
    at HTMLDocument.y.handle (jquery-2.1.0.min.js:3)

function(k) {
    var p = 0;
    unmark.show_mark_info = function(a) {
        var e, n = a.data("mark"), t = k("#" + n).html(), r = jQuery.parseJSON(t), s = n.replace("mark-data-", ""), o = k("#mark-" + s).find(".note-placeholder").text(), l = (a.data("nofade"),
        null != r.mark_title ? r.mark_title : r.title);
        r.mark_title = l;
        var u = ""
          , d = Object.keys(r.tags).length <---------

Loaded marks:

{
"lookup_type":"all",
"marks":{
"0":{
"mark_id":"2",
"mark_title":null,
"notes":null,
"active":"1",
"created_on":"2020-11-23 18:15:12",
"archived_on":null,
"title":"Step 2: Watch a video walkthrough of Unmark",
"url":"https:\/\/www.notion.so\/cdevroe\/Unmark-Help-Video-walkthrough-of-Unmark-UI-e5efd1ed5eaf42298e67fb087e476f33",
"embed":null,
"label_id":"3",
"label_name":"Watch",
"tags":{
},
"nice_time":"23 minutes ago"
},
"1":{
"mark_id":"3",
"mark_title":null,
"notes":null,
"active":"1",
"created_on":"2020-11-23 18:15:12",
"archived_on":null,
"title":"Step 3: Discover new bookmarks",
"url":"https:\/\/www.notion.so\/cdevroe\/Unmark-Help-Discover-featured-bookmarks-2091a6b3871c4b29a209b72d5c3e9bca",
"embed":null,
"label_id":"7",
"label_name":"Do",
"tags":{
},
"nice_time":"23 minutes ago"
}
},
"page":"2",
"pages":2,
"per_page":30,
"total":32

[cdevroe]

It looks like you might have found a bug with the infinite scroll page loading. It appears to be working on mobile, but not on Desktop. I'm going to see if I can verify this.

[cdevroe]

I dug into this a little, I am wondering if this only happens at certain viewport sizes. Unmark does some antiquated things with how it loads more marks... I think it'd be good to perhaps have this completely redone in the future. But for now, if someone has exactly 32 marks and a certain viewport size, it may just have to continue to have this bug. Unfortunately.