Code presenting problems in mobile device browsers but working on desktops

The code below is working normally in desktop browsers and presenting a duplication error in the first digit when opened in mobile device browsers. It also happens on edge in the latest version when opened on a laptop (the same version works normally on a PC).

Could anyone take a look and see if they can find any possible problems in the code?

[LettersS_Interval]

----+ System: Trigger once

-----> System: Set totalCharacters to 0

-----> System: Set countDigits to 0

-----> System: Set count to 1

-----> System: Set amount to 10

-----> System: Set totalCharacters to amountOfDigits

-----> Array: Set size to (10, 1, 1)

-----> Array: Set value at 0 to "A"

-----> Array: Set value at 1 to "B"

-----> Array: Set value at 2 to "C"

-----> Array: Set value at 3 to "D"

-----> Array: Set value at 4 to "E"

-----> Array: Set value at 5 to "F"

-----> Array: Set value at 6 to "G"

-----> Array: Set value at 7 to "H"

-----> Array: Set value at 8 to "I"

-----> Array: Set value at 9 to "J"

-----> System: Create object timer on layer "PanelTXT" at (34, -37), create hierarchy: False, template: ""

-----> AdvancedRandom: Create permutation with amount values starting at 0

-----> timer: Start Timer "changeDigit" for 1.5 (Regular)

----+ timer: On Timer "changeDigit"

--------+ System: totalCharacters > 0

------------+ System: Pick panelText where panelText.id = countDigits+1

-------------> panelText: Set text to Array.At(AdvancedRandom.Permutation(countDigits-1))

-------------> textTemp: Append Array.At(AdvancedRandom.Permutation(countDigits-1))

----------------+ System: Trigger once

-----------------> System: Wait 0.75 seconds

-----------------> panelText: Set text to "*"

-----------------> System: Wait 0.75 seconds

-----------------> System: Add 1 to countDigits

-----------------> System: Subtract 1 from totalCharacters

--------+ System: Else

---------> System: Set countDigits to 0

---------> System: Wait 0.75 seconds

---------> System: Set keyActive to True

---------> timer: Stop Timer "changeDigit"

---------> timer: Destroy

---------> System: Set group "LettersS_Interval" Deactivated

------------+ System: Is timerController

-------------> System: Set group "Timebar" Activated

----+ System: Repeat amount times

--------+ System: Pick keyText where keyText.id = count

---------> keyText: Set text to Keyboard.StringFromKeyCode(64+count)

---------> System: Add 1 to count

Thanks for answering.

Sorry for only including this part of the code, but it is long and only this part presents an error. I'm including a printscreen to make it easier to read.

Regarding the error: this part of the code should display a total (totalCharacters) of digits (letters or numbers) one by one with a pause of 1.5 seconds between them and as it shows each digit, it then shows an asterisk in its place.

Example with 3 digits:

Step 1: 7

Step 2: *

Step 3: * 4

Step 4: * *

Step 5: * * 1

Step 6: * * *

The error that occurs is that the first digit (7 in the example) is repeated 2 times, generating 4 digits in the result, instead of 3

Example of a 3-digit error:

Step 1: 7

Step 3: *

Step 4: 7

Step 5: *

Step 6: * 4

Step 7: * *

Step 8: * * 1

Step 9: * * *

I replaced the timer for every second event to see if the error could be in the behavior, but it didn't solve it. The strangest thing is that this problem only appears in mobile device browsers. In the 3 desktop browsers (edge/chrome/firefox) this system works perfectly