I have no idea why it crashes when you try to tag the files, but MC may be reading some existing file tag values to the Album Artist library field.
The current implementation of the ID3v2 tag reader reads the contents of the TPE2 file tag (= officially 'Band/Orchestra/Accompaniment', but used as Album Artist by programs like WMP and iTunes) and also the TXXX (Album Artist) file tag to the Album Artist library field.
Old MC versions wrote the Band library field to TPE2 (currectly MC uses a custom TXXX tag frame for the Band library field).
A "tag dump" might be helpful. Could you do the following?
Select one of the affected files and click the very first text line in the "Action Window > Tag" to open the "detailed format info" window. It shows a direct tag dump from the file. Once opened, right-click the detailed format info and copy the contents to clipboard. Paste the text in your reply like this:
MPEG-1 Layer 3
256 Kbit VBR
44.1 Khz Joint stereo
Copyrighted: No
Original: Yes
Protected by CRC: No
Encoder: LAME
Gapless: Yes (576 start, 1428 end)
ID3v1 Tag: (128 bytes)
Name: All Along The Watchtower
Artist: Eddie Vedder & The Million Dol
Album: I'm Not There
Year: 2007
Comment: Disc 1
Track #: 1
Genre: Soundtrack (24)
ID3v2.3 Tag: (2953 bytes)
TALB (Album): I'm Not There
TPE1 (Artist): Eddie Vedder & The Million Dollar Bashers
TPE2 (Album Artist): Various Artists
TBPM (BPM): 125
COMM (Comment): Disc 1
TPOS (Disc #): 1/2
TSSE (Encoding Settings): LAME 3.98.2 -V1
TCON (Genre): Soundtrack
TIT2 (Name): All Along The Watchtower
TRCK (Track #): 1/16
TYER (Year): 2007
TXXX (ALBUM ARTIST): Various Artists
TXXX (INTENSITY): 5
TXXX (replaygain_track_g..): -9.42 dB
TXXX (replaygain_track_p..): 0.985740
TXXX (replaygain_album_g..): -7.71 dB
TXXX (replaygain_album_p..): 0.985740
TXXX (TOOL NAME): Media Center
TXXX (TOOL VERSION): 13.0.112