Anyone having issues importing Custom Properties on 2020.2.6 ?

After upgrading to version 2020.2.6 unable to import custom properties, getting error messages and it fails. 

Prior to upgrade was able to import spreadsheets that were 15,000 rows and 8 columns wide. After the upgrade it errors out. The only workaround I have found so far it to reduce the number of

rows to less than 2000 and even at that is still sometimes fails. 

Anyone else had any issues importing?