Pioneer DEH-4000UB issue - only plays the first 89 tracks of an mp3 cd?? help?

[SadbutTrue 10+ year member]

I just got a Pioneer DEH-4000UB head unit last month. It works great, except I noticed on the first mp3 cd I burned for it, it only played until track 89 (there were ~130 tracks on the cd).

Just now, I burned a second cd. I got rid of the song that was #90 on the previous cd and changed a few others while i was at it. Just tried it and the cd player only reads up to track 89 again.

Anyone have experience with this? Its not such a huge issue that i'd moan to the manufacturer or the guy I had install it, but it is definitely annoying. Could it require a firmware update or something (if so, how do you do that)?

Thanks for any help you can give me.

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[SadbutTrue 10+ year member]

anyone?