[Android] Continuing to write a string after placing it in bold wrongly duplicates it

[Softvision-PatriciuPop]

[Affected Platforms]:

• Android 8.0.0 (Google Pixel)
• Android 7.1.1 (Nokia 6)

[Prerequisites]:

• The notes-1_2_0_signed.apk is installed.
• Logged in with a valid "Firefox" account.

[Steps to reproduce]:

1. Open the Notes application and add a new note.
2. Enter a string of text with "**" before and after the it.
3. Without pressing space type another character and observe the behavior.

[Expected result]:

• A single character is displayed after the string.

[Actual result]:

• The bolded string is duplicated.

[Notes]:

• This issue is also reproducible with underscores.
• This issue is also reproducible with italics.
• Deleting the duplicated string and a character from the bolded one cause the bolded string to be replaced with the string before it.
• Attached a screen recording of the issue:
  

[Ilphrin]

Hi! Could not reproduce this issue on version 1.3.0, Android 9 (Lineage OS)