Description:
See attached sheet. Column "A" is formatted by column as MM/DD/YY. When I overtype (re-enter) a date in column "A", the resulting date is formatted as MM/DD/YYYY instead of MM/DD/YY. The issue persists when the column is reformatted as MM/DD/YY and the steps are repeated.

Data typed into an empty cell, however, gets formatted correctly.

This is a very recent regression, in the last two weeks Fedora 30 distro updates:

libreoffice.x86_64                               1:6.2.5.2-1.fc30                                      
libreoffice-base.x86_64                          1:6.2.5.2-1.fc30                                      
libreoffice-calc.x86_64                          1:6.2.5.2-1.fc30                                 

Version: 6.2.5.2
Build ID: 6.2.5.2-1.fc30
CPU threads: 4; OS: Linux 5.1; UI render: default; VCL: gtk3; 
Locale: en-US (en_US.UTF-8); UI-Language: en-US
Calc: threaded

From: 

Steps to Reproduce:
See attached sheet. Column "A" is formatted by column as MM/DD/YY. When I overtype (re-enter) a date in column "A", the resulting date is formatted as MM/DD/YYYY instead of MM/DD/YY.

Actual Results:
MM/DD/YYYY

Expected Results:
MM/DD/YY


Reproducible: Sometimes


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info: