If you scroll down with the v / ^ buttons on top of iOS virtual keyboard, does the toolbar appear then?

I don't have iPhone simulator. 
But i scroll down in the below devices but the toolbar doesn't appear:
- iPhone 7, iOS v12.3.1, Safari
- iPhone X, iOS v13.0, Safari
- Galaxy Note 8, Android9, SamSung Internet Browser v9.4.00.45
- Change user-agent of Firefox on Mac-OS to iPhone/Safari 12.1.1
- Change user-agent of Firefox on Mac-OS to Android phone/Firefox 68
- Change user-agent of Firefox on Mac-OS to Android phone/Chrome 76

Created attachment 153656 [details]
Toolbar-down in the new version

In my debug in old version of bundle.js, createToolbar() method has the following code:
        if (_inMobileMode()) {
            $("#mobile-edit-button").show();
            initMobileToolbar(toolItems)
        } else {
            $("#toolbar-down").show();
            initNormalToolbar(toolItems)
        }

But in the latest image, It become the followng code 
        function createToolbar() {
            if (_inMobileMode()) {
                $("#mobile-edit-button").show()
            } else {
                $("#toolbar-down").show();
                initNormalToolbar()
            }
        }
The initMobileToolbar() method have been removed.
So, if i add "$("#toolbar-down").show();" code into click event of #mobile-edit-button.
                if (L.Browser.mobile) {
                    var button = $("#mobile-edit-button");
                    button.show();
                    button.off("click");
                    var that = this;
                    button.on("click", function() {
                        button.hide();
                        that._enterEditMode("edit");
                        that.fire("editorgotfocus");
                        if (!(window.ThisIsTheiOSApp || window.ThisIsTheAndroidApp)) that.focus();
                        $("#toolbar-down").show();
                    });
                    this._enterReadOnlyMode("readonly")
                }

#toolbar-down will be displayed as attached file in the previous comment.

This is a non-related question, save icon in the toolbar-down was removed?

Created attachment 153726 [details]
Bottom toolbar isn't displayed after click some toolbar icon

After i used above method, bottom toolbar is shown in the edit screen.
But when i use some icon in the bottom, screen auto zoom-out and the toolbar isn't displayed.
Please check attached LOOL_toolbar.mp4 file.

Let's set the issue to confirmed. There are potentially multiple bugs together (eg. when LOOL is integrated into an app like Nextcloud/ownCloud, it can also cause the view to extend below the end of screen, and hide some content in the bottom).

LOOLWSD master (git hash: f7079c96)
LOKit   LibreOfficeDev 6.4.0.0.alpha0 (git hash: 61b757f)

Just tried with LOOLwsd 6.4.0 and LOkit 6.4.1.1.0: Safari on iPad won't show both the bottom toolbar and the keyboard. Almost all buttons remain grey.

This should be working fine in recent builds.