My two macros "clash", i.e. they cannot operate simultaneously - excel

Question

Background
I have 2 macros in one of my worksheets that i) get the Previous Close price from Bloomberg's website straight into the worksheet [trigered by a button] (Cells H3:downwards) and ii) the other registers a timestamp if this new value causes a change in a formula located in cells K3:downwards. Then, if there is any change, the time in which it happened will be registered in the columns to the immediate right of column H.
My problem lies in that when I press the button to launch Macro i), the debugger pops "Run time error 1004. Method 'undo' of Object'_application' failed " causing Macro ii) to stop working (i.e. to stop registering the time in which there was a change in value in the column of interest). The line of code highlighted by the debugger is "Application.undo"
To be honest, I am a bit lost on the process.
This is the code
Disclaimer: Most of the comments are there to educate myself on how the code actually works. Many thanks to everyone who contributed to both Subs.
Private Sub Worksheet_Calculate()
Dim rMonitored As Range
Dim MonitoredCell As Range
Dim vSelected As Variant
Dim aNewValues As Variant
Dim ixFormulaCell As Long
On Error Resume Next
Set rMonitored = Me.Columns("K").SpecialCells(xlCellTypeFormulas)
On Error GoTo 0
If rMonitored Is Nothing Then Exit Sub 'No formula cells in column K
Application.EnableEvents = False 'Disable events to prevent infinite calc loop
Set vSelected = Selection 'Remember current selection (it may not be a range)
'Prepare the array that will store the new values, the cells those values are in, and whether or not there was a change
ReDim aNewValues(1 To rMonitored.Cells.Count, 1 To 3)
'Column1 = new value
'Column2 = cell address
'Column3 = did value change?
'Get the new value for each formula in column K
ixFormulaCell = 0
For Each MonitoredCell In rMonitored.Cells 'The formula cells may not be in a contiguous range
ixFormulaCell = ixFormulaCell + 1
aNewValues(ixFormulaCell, 1) = MonitoredCell.Value 'Store the new value
Set aNewValues(ixFormulaCell, 2) = MonitoredCell 'Store the cell address
Next MonitoredCell
Application.Undo 'This will undo the most recent change, which allows us to compare the new vs old to check for formula updates
ixFormulaCell = 0
For Each MonitoredCell In rMonitored.Cells
ixFormulaCell = ixFormulaCell + 1
'Check if the formula result is different
If MonitoredCell.Value <> aNewValues(ixFormulaCell, 1) Then
'Formula result found to be different, record that
'We can't put the timestamp in now because we still have to redo the most recent change
aNewValues(ixFormulaCell, 3) = True
End If
Next MonitoredCell
Application.Undo 'Redo the most recent change to put worksheet back in the new state
'--> THE LINE OF CODE ABOVE IS WHAT THE DEBUGGER POINTS TO
'Now that we've completed our comparison and have re-done the most recent change, check what did change and put in a timestamp in the next empty cell in same row
For ixFormulaCell = LBound(aNewValues, 1) To UBound(aNewValues, 1)
'Check for formula result change
If aNewValues(ixFormulaCell, 3) Then
'Formula result change found, get next empty cell in same row
With Me.Cells(aNewValues(ixFormulaCell, 2).Row, Me.Columns.Count).End(xlToLeft).Offset(, 1)
'Next empty cell found, put in the current datetime stamp and format it
.Value = Now
.NumberFormat = "dd-mm-yyyy, hh:mm:ss"
.HorizontalAlignment = xlGeneral
.VerticalAlignment = xlCenter
End With
End If
Next ixFormulaCell
vSelected.Select 'Re-select the remembered selection so that this operation is invisible to users
Application.EnableEvents = True 'Re-enable events so that the next calculation can be monitored for formula changes in cells of interest
End Sub
Public Sub test()
Dim re As Object, pairs(), ws As Worksheet, i As Long, s As String
Set ws = ThisWorkbook.Worksheets("Sheet1")
Set re = CreateObject("VBScript.RegExp")
With ws
pairs = Application.Transpose(.Range("G3:G" & .Cells(.Rows.Count, "G").End(xlUp).Row).Value) ' assumes pairs start in row 3
End With
Dim results()
ReDim results(1 To UBound(pairs))
With CreateObject("MSXML2.XMLHTTP")
For i = LBound(pairs) To UBound(pairs)
.Open "GET", "https://www.bloomberg.com/quote/" & pairs(i) & ":CUR", False
.send
s = .responseText
results(i) = GetCloseValue(re, s, "previousClosingPriceOneTradingDayAgo%22%3A(.*?)%2")
Next
End With
ws.Cells(3, "I").Resize(UBound(results), 1) = Application.Transpose(results)
End Sub
Public Function GetCloseValue(ByVal re As Object, inputString As String, ByVal pattern As String) As String 'https://regex101.com/r/OAyq30/1
With re
.Global = True
.MultiLine = True
.IgnoreCase = False
.pattern = pattern
If .test(inputString) Then
GetCloseValue = .Execute(inputString)(0).SubMatches(0)
Else
GetCloseValue = "Not found"
End If
End With
End Function
Expected output
I would like both Macros to work simultaneously.