Decade and ReleaseDate tags

[stefano_mbp]

Hello,

a few weeks ago I started to use Decade and ReleaseDate tags and I could find two "strange" behavior

1) Decade: I find in the log file many warnings like

Warning: sort value conflict for Decade filter 1920s
first conflicting value is '1928' in item 'Barcarolle, op. 60 In F-sharp major'
second conflicting value is '1927' in item 'Chanson de matin, Op. 15 No. 2'

This one of the many and is related to an Artur Rubinstein boxset where in the same disc you can find recording from different years.
It seems that the warning occurs if in the same disc different dates are defined.
In tag options I use this definition "Decade.decade.index"

2) ReleaseDate: everything works fine, I use it mainly for some remastered cd .... but if I use the year 2020 it do not work, I cannot find it anywhere.
The two albums in which I have used 2020 as ReleaseDate are found in the unknown folder as other album without and ReleaseDate defined

..... some more information

About the warning for Decade

The first item is from Rubinstein and the second is from Edward Elgar, so they are different albums (... it was a little bit difficult to find the exact album as the log in very informative....)